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tty: Introduce some close helpers for ports
Again this is a lot of common code we can unify Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox
Linus Torvalds
parent
7834909f1e
commit
a6614999e8
@ -945,76 +945,30 @@ static void isicom_flush_buffer(struct tty_struct *tty)
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static void isicom_close(struct tty_struct *tty, struct file *filp)
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{
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struct isi_port *port = tty->driver_data;
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struct isi_port *ip = tty->driver_data;
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struct tty_port *port = &ip->port;
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struct isi_board *card;
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unsigned long flags;
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if (!port)
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return;
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card = port->card;
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if (isicom_paranoia_check(port, tty->name, "isicom_close"))
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BUG_ON(!ip);
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card = ip->card;
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if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
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return;
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pr_dbg("Close start!!!.\n");
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spin_lock_irqsave(&port->port.lock, flags);
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if (tty_hung_up_p(filp)) {
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spin_unlock_irqrestore(&port->port.lock, flags);
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return;
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}
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if (tty->count == 1 && port->port.count != 1) {
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printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
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"count tty->count = 1 port count = %d.\n",
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card->base, port->port.count);
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port->port.count = 1;
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}
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if (--port->port.count < 0) {
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printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
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"count for channel%d = %d", card->base, port->channel,
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port->port.count);
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port->port.count = 0;
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}
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if (port->port.count) {
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spin_unlock_irqrestore(&port->port.lock, flags);
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return;
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}
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port->port.flags |= ASYNC_CLOSING;
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tty->closing = 1;
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spin_unlock_irqrestore(&port->port.lock, flags);
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if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
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tty_wait_until_sent(tty, port->port.closing_wait);
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/* indicate to the card that no more data can be received
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on this port */
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spin_lock_irqsave(&card->card_lock, flags);
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if (port->port.flags & ASYNC_INITIALIZED) {
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card->port_status &= ~(1 << port->channel);
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if (port->flags & ASYNC_INITIALIZED) {
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card->port_status &= ~(1 << ip->channel);
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outw(card->port_status, card->base + 0x02);
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}
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isicom_shutdown_port(port);
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isicom_shutdown_port(ip);
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spin_unlock_irqrestore(&card->card_lock, flags);
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isicom_flush_buffer(tty);
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tty_ldisc_flush(tty);
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spin_lock_irqsave(&port->port.lock, flags);
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tty->closing = 0;
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if (port->port.blocked_open) {
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spin_unlock_irqrestore(&port->port.lock, flags);
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if (port->port.close_delay) {
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pr_dbg("scheduling until time out.\n");
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msleep_interruptible(
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jiffies_to_msecs(port->port.close_delay));
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}
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spin_lock_irqsave(&port->port.lock, flags);
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wake_up_interruptible(&port->port.open_wait);
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}
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port->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
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wake_up_interruptible(&port->port.close_wait);
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spin_unlock_irqrestore(&port->port.lock, flags);
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tty_port_close_end(port, tty);
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}
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/* write et all */
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@ -767,7 +767,7 @@ static int stli_parsebrd(struct stlconf *confp, char **argp)
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break;
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}
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if (i == ARRAY_SIZE(stli_brdstr)) {
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printk("STALLION: unknown board name, %s?\n", argp[0]);
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printk(KERN_WARNING "istallion: unknown board name, %s?\n", argp[0]);
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return 0;
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}
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@ -855,21 +855,8 @@ static void stli_close(struct tty_struct *tty, struct file *filp)
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return;
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port = &portp->port;
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spin_lock_irqsave(&port->lock, flags);
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if (tty_hung_up_p(filp)) {
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spin_unlock_irqrestore(&port->lock, flags);
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if (tty_port_close_start(port, tty, filp) == 0)
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return;
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}
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if (tty->count == 1 && port->count != 1)
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port->count = 1;
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if (port->count-- > 1) {
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spin_unlock_irqrestore(&port->lock, flags);
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return;
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}
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port->flags |= ASYNC_CLOSING;
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tty->closing = 1;
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spin_unlock_irqrestore(&port->lock, flags);
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/*
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* May want to wait for data to drain before closing. The BUSY flag
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@ -882,6 +869,8 @@ static void stli_close(struct tty_struct *tty, struct file *filp)
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stli_flushchars(tty);
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spin_unlock_irqrestore(&stli_lock, flags);
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/* We end up doing this twice for the moment. This needs looking at
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eventually. Note we still use portp->closing_wait as a result */
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if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
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tty_wait_until_sent(tty, portp->closing_wait);
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@ -905,17 +894,8 @@ static void stli_close(struct tty_struct *tty, struct file *filp)
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set_bit(ST_DOFLUSHRX, &portp->state);
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stli_flushbuffer(tty);
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tty->closing = 0;
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tty_port_tty_set(&portp->port, NULL);
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if (port->blocked_open) {
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if (portp->close_delay)
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msleep_interruptible(jiffies_to_msecs(portp->close_delay));
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wake_up_interruptible(&port->open_wait);
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}
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port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
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wake_up_interruptible(&port->close_wait);
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tty_port_close_end(port, tty);
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tty_port_tty_set(port, NULL);
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}
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/*****************************************************************************/
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@ -1482,7 +1462,7 @@ static int stli_getserial(struct stliport *portp, struct serial_struct __user *s
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sio.irq = 0;
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sio.flags = portp->port.flags;
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sio.baud_base = portp->baud_base;
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sio.close_delay = portp->close_delay;
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sio.close_delay = portp->port.close_delay;
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sio.closing_wait = portp->closing_wait;
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sio.custom_divisor = portp->custom_divisor;
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sio.xmit_fifo_size = 0;
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@ -1514,7 +1494,7 @@ static int stli_setserial(struct tty_struct *tty, struct serial_struct __user *s
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return -EFAULT;
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if (!capable(CAP_SYS_ADMIN)) {
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if ((sio.baud_base != portp->baud_base) ||
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(sio.close_delay != portp->close_delay) ||
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(sio.close_delay != portp->port.close_delay) ||
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((sio.flags & ~ASYNC_USR_MASK) !=
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(portp->port.flags & ~ASYNC_USR_MASK)))
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return -EPERM;
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@ -1523,7 +1503,7 @@ static int stli_setserial(struct tty_struct *tty, struct serial_struct __user *s
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portp->port.flags = (portp->port.flags & ~ASYNC_USR_MASK) |
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(sio.flags & ASYNC_USR_MASK);
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portp->baud_base = sio.baud_base;
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portp->close_delay = sio.close_delay;
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portp->port.close_delay = sio.close_delay;
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portp->closing_wait = sio.closing_wait;
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portp->custom_divisor = sio.custom_divisor;
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@ -2065,7 +2045,7 @@ static void __stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigne
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unsigned char __iomem *bits;
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if (test_bit(ST_CMDING, &portp->state)) {
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printk(KERN_ERR "STALLION: command already busy, cmd=%x!\n",
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printk(KERN_ERR "istallion: command already busy, cmd=%x!\n",
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(int) cmd);
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return;
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}
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@ -2625,7 +2605,7 @@ static int stli_initports(struct stlibrd *brdp)
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for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) {
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portp = kzalloc(sizeof(struct stliport), GFP_KERNEL);
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if (!portp) {
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printk("STALLION: failed to allocate port structure\n");
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printk(KERN_WARNING "istallion: failed to allocate port structure\n");
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continue;
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}
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tty_port_init(&portp->port);
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@ -2635,7 +2615,7 @@ static int stli_initports(struct stlibrd *brdp)
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portp->brdnr = brdp->brdnr;
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portp->panelnr = panelnr;
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portp->baud_base = STL_BAUDBASE;
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portp->close_delay = STL_CLOSEDELAY;
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portp->port.close_delay = STL_CLOSEDELAY;
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portp->closing_wait = 30 * HZ;
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init_waitqueue_head(&portp->port.open_wait);
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init_waitqueue_head(&portp->port.close_wait);
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@ -2692,7 +2672,7 @@ static void __iomem *stli_ecpgetmemptr(struct stlibrd *brdp, unsigned long offse
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unsigned char val;
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if (offset > brdp->memsize) {
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printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
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printk(KERN_ERR "istallion: shared memory pointer=%x out of "
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"range at line=%d(%d), brd=%d\n",
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(int) offset, line, __LINE__, brdp->brdnr);
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ptr = NULL;
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@ -2766,7 +2746,7 @@ static void __iomem *stli_ecpeigetmemptr(struct stlibrd *brdp, unsigned long off
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unsigned char val;
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if (offset > brdp->memsize) {
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printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
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printk(KERN_ERR "istallion: shared memory pointer=%x out of "
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"range at line=%d(%d), brd=%d\n",
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(int) offset, line, __LINE__, brdp->brdnr);
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ptr = NULL;
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@ -2818,7 +2798,7 @@ static void __iomem *stli_ecpmcgetmemptr(struct stlibrd *brdp, unsigned long off
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unsigned char val;
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if (offset > brdp->memsize) {
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printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
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printk(KERN_ERR "istallion: shared memory pointer=%x out of "
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"range at line=%d(%d), brd=%d\n",
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(int) offset, line, __LINE__, brdp->brdnr);
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ptr = NULL;
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@ -2863,7 +2843,7 @@ static void __iomem *stli_ecppcigetmemptr(struct stlibrd *brdp, unsigned long of
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unsigned char val;
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if (offset > brdp->memsize) {
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printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
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printk(KERN_ERR "istallion: shared memory pointer=%x out of "
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"range at line=%d(%d), board=%d\n",
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(int) offset, line, __LINE__, brdp->brdnr);
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ptr = NULL;
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@ -2928,7 +2908,7 @@ static void __iomem *stli_onbgetmemptr(struct stlibrd *brdp, unsigned long offse
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void __iomem *ptr;
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if (offset > brdp->memsize) {
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printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
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printk(KERN_ERR "istallion: shared memory pointer=%x out of "
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"range at line=%d(%d), brd=%d\n",
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(int) offset, line, __LINE__, brdp->brdnr);
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ptr = NULL;
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@ -2994,7 +2974,7 @@ static void __iomem *stli_onbegetmemptr(struct stlibrd *brdp, unsigned long offs
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unsigned char val;
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if (offset > brdp->memsize) {
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printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
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printk(KERN_ERR "istallion: shared memory pointer=%x out of "
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"range at line=%d(%d), brd=%d\n",
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(int) offset, line, __LINE__, brdp->brdnr);
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ptr = NULL;
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@ -3433,7 +3413,7 @@ static int stli_startbrd(struct stlibrd *brdp)
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#endif
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if (nrdevs < (brdp->nrports + 1)) {
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printk(KERN_ERR "STALLION: slave failed to allocate memory for "
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printk(KERN_ERR "istallion: slave failed to allocate memory for "
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"all devices, devices=%d\n", nrdevs);
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brdp->nrports = nrdevs - 1;
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}
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@ -3443,13 +3423,13 @@ static int stli_startbrd(struct stlibrd *brdp)
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brdp->bitsize = (nrdevs + 7) / 8;
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memoff = readl(&hdrp->memp);
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if (memoff > brdp->memsize) {
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printk(KERN_ERR "STALLION: corrupted shared memory region?\n");
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printk(KERN_ERR "istallion: corrupted shared memory region?\n");
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rc = -EIO;
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goto stli_donestartup;
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}
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memp = (cdkmem_t __iomem *) EBRDGETMEMPTR(brdp, memoff);
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if (readw(&memp->dtype) != TYP_ASYNCTRL) {
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printk(KERN_ERR "STALLION: no slave control device found\n");
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printk(KERN_ERR "istallion: no slave control device found\n");
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goto stli_donestartup;
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}
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memp++;
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@ -3534,7 +3514,7 @@ static int __devinit stli_brdinit(struct stlibrd *brdp)
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retval = stli_initonb(brdp);
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break;
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default:
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printk(KERN_ERR "STALLION: board=%d is unknown board "
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printk(KERN_ERR "istallion: board=%d is unknown board "
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"type=%d\n", brdp->brdnr, brdp->brdtype);
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retval = -ENODEV;
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}
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@ -3543,7 +3523,7 @@ static int __devinit stli_brdinit(struct stlibrd *brdp)
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return retval;
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stli_initports(brdp);
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printk(KERN_INFO "STALLION: %s found, board=%d io=%x mem=%x "
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printk(KERN_INFO "istallion: %s found, board=%d io=%x mem=%x "
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"nrpanels=%d nrports=%d\n", stli_brdnames[brdp->brdtype],
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brdp->brdnr, brdp->iobase, (int) brdp->memaddr,
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brdp->nrpanels, brdp->nrports);
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@ -3637,7 +3617,7 @@ static int stli_eisamemprobe(struct stlibrd *brdp)
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if (! foundit) {
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brdp->memaddr = 0;
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brdp->membase = NULL;
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printk(KERN_ERR "STALLION: failed to probe shared memory "
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printk(KERN_ERR "istallion: failed to probe shared memory "
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"region for %s in EISA slot=%d\n",
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stli_brdnames[brdp->brdtype], (brdp->iobase >> 12));
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return -ENODEV;
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@ -3782,7 +3762,7 @@ static int __devinit stli_pciprobe(struct pci_dev *pdev,
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mutex_lock(&stli_brdslock);
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brdnr = stli_getbrdnr();
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if (brdnr < 0) {
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printk(KERN_INFO "STALLION: too many boards found, "
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printk(KERN_INFO "istallion: too many boards found, "
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"maximum supported %d\n", STL_MAXBRDS);
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mutex_unlock(&stli_brdslock);
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retval = -EIO;
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@ -3854,7 +3834,7 @@ static struct stlibrd *stli_allocbrd(void)
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brdp = kzalloc(sizeof(struct stlibrd), GFP_KERNEL);
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if (!brdp) {
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printk(KERN_ERR "STALLION: failed to allocate memory "
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printk(KERN_ERR "istallion: failed to allocate memory "
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"(size=%Zd)\n", sizeof(struct stlibrd));
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return NULL;
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}
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@ -4493,7 +4473,7 @@ static int __init istallion_module_init(void)
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stli_txcookbuf = kmalloc(STLI_TXBUFSIZE, GFP_KERNEL);
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if (!stli_txcookbuf) {
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printk(KERN_ERR "STALLION: failed to allocate memory "
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printk(KERN_ERR "istallion: failed to allocate memory "
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"(size=%d)\n", STLI_TXBUFSIZE);
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retval = -ENOMEM;
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goto err;
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@ -4518,7 +4498,7 @@ static int __init istallion_module_init(void)
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retval = tty_register_driver(stli_serial);
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if (retval) {
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printk(KERN_ERR "STALLION: failed to register serial driver\n");
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printk(KERN_ERR "istallion: failed to register serial driver\n");
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goto err_ttyput;
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}
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@ -4532,7 +4512,7 @@ static int __init istallion_module_init(void)
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*/
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retval = register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stli_fsiomem);
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if (retval) {
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printk(KERN_ERR "STALLION: failed to register serial memory "
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printk(KERN_ERR "istallion: failed to register serial memory "
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"device\n");
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goto err_deinit;
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}
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@ -1080,57 +1080,26 @@ static void mxser_flush_buffer(struct tty_struct *tty)
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static void mxser_close(struct tty_struct *tty, struct file *filp)
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{
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struct mxser_port *info = tty->driver_data;
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struct tty_port *port = &info->port;
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unsigned long timeout;
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unsigned long flags;
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if (tty->index == MXSER_PORTS)
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return;
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if (!info)
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return;
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spin_lock_irqsave(&info->port.lock, flags);
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if (tty_port_close_start(port, tty, filp) == 0)
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return;
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if (tty_hung_up_p(filp)) {
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spin_unlock_irqrestore(&info->port.lock, flags);
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return;
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}
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if ((tty->count == 1) && (info->port.count != 1)) {
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/*
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* Uh, oh. tty->count is 1, which means that the tty
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* structure will be freed. Info->port.count should always
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* be one in these conditions. If it's greater than
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* one, we've got real problems, since it means the
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* serial port won't be shutdown.
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*/
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printk(KERN_ERR "mxser_close: bad serial port count; "
|
||||
"tty->count is 1, info->port.count is %d\n", info->port.count);
|
||||
info->port.count = 1;
|
||||
}
|
||||
if (--info->port.count < 0) {
|
||||
printk(KERN_ERR "mxser_close: bad serial port count for "
|
||||
"ttys%d: %d\n", tty->index, info->port.count);
|
||||
info->port.count = 0;
|
||||
}
|
||||
if (info->port.count) {
|
||||
spin_unlock_irqrestore(&info->port.lock, flags);
|
||||
return;
|
||||
}
|
||||
info->port.flags |= ASYNC_CLOSING;
|
||||
spin_unlock_irqrestore(&info->port.lock, flags);
|
||||
/*
|
||||
* Save the termios structure, since this port may have
|
||||
* separate termios for callout and dialin.
|
||||
*
|
||||
* FIXME: Can this go ?
|
||||
*/
|
||||
if (info->port.flags & ASYNC_NORMAL_ACTIVE)
|
||||
info->normal_termios = *tty->termios;
|
||||
/*
|
||||
* Now we wait for the transmit buffer to clear; and we notify
|
||||
* the line discipline to only process XON/XOFF characters.
|
||||
*/
|
||||
tty->closing = 1;
|
||||
if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
|
||||
tty_wait_until_sent(tty, info->port.closing_wait);
|
||||
/*
|
||||
* At this point we stop accepting input. To do this, we
|
||||
* disable the receive line status interrupts, and tell the
|
||||
@ -1156,19 +1125,12 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
|
||||
}
|
||||
}
|
||||
mxser_shutdown(tty);
|
||||
|
||||
mxser_flush_buffer(tty);
|
||||
tty_ldisc_flush(tty);
|
||||
|
||||
tty->closing = 0;
|
||||
tty_port_tty_set(&info->port, NULL);
|
||||
if (info->port.blocked_open) {
|
||||
if (info->port.close_delay)
|
||||
schedule_timeout_interruptible(info->port.close_delay);
|
||||
wake_up_interruptible(&info->port.open_wait);
|
||||
}
|
||||
|
||||
info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
|
||||
/* Right now the tty_port set is done outside of the close_end helper
|
||||
as we don't yet have everyone using refcounts */
|
||||
tty_port_close_end(port, tty);
|
||||
tty_port_tty_set(port, NULL);
|
||||
}
|
||||
|
||||
static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
||||
|
||||
@ -929,35 +929,11 @@ static void rc_close(struct tty_struct *tty, struct file *filp)
|
||||
if (!port || rc_paranoia_check(port, tty->name, "close"))
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&port->port.lock, flags);
|
||||
|
||||
if (tty_hung_up_p(filp))
|
||||
goto out;
|
||||
|
||||
bp = port_Board(port);
|
||||
if ((tty->count == 1) && (port->port.count != 1)) {
|
||||
printk(KERN_INFO "rc%d: rc_close: bad port count;"
|
||||
" tty->count is 1, port count is %d\n",
|
||||
board_No(bp), port->port.count);
|
||||
port->port.count = 1;
|
||||
}
|
||||
if (--port->port.count < 0) {
|
||||
printk(KERN_INFO "rc%d: rc_close: bad port count "
|
||||
"for tty%d: %d\n",
|
||||
board_No(bp), port_No(port), port->port.count);
|
||||
port->port.count = 0;
|
||||
}
|
||||
if (port->port.count)
|
||||
goto out;
|
||||
port->port.flags |= ASYNC_CLOSING;
|
||||
/*
|
||||
* Now we wait for the transmit buffer to clear; and we notify
|
||||
* the line discipline to only process XON/XOFF characters.
|
||||
*/
|
||||
tty->closing = 1;
|
||||
spin_unlock_irqrestore(&port->port.lock, flags);
|
||||
if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
|
||||
tty_wait_until_sent(tty, port->port.closing_wait);
|
||||
|
||||
if (tty_port_close_start(&port->port, tty, filp) == 0)
|
||||
return;
|
||||
|
||||
/*
|
||||
* At this point we stop accepting input. To do this, we
|
||||
* disable the receive line status interrupts, and tell the
|
||||
@ -989,23 +965,8 @@ static void rc_close(struct tty_struct *tty, struct file *filp)
|
||||
rc_shutdown_port(tty, bp, port);
|
||||
rc_flush_buffer(tty);
|
||||
spin_unlock_irqrestore(&riscom_lock, flags);
|
||||
tty_ldisc_flush(tty);
|
||||
|
||||
spin_lock_irqsave(&port->port.lock, flags);
|
||||
tty->closing = 0;
|
||||
port->port.tty = NULL;
|
||||
if (port->port.blocked_open) {
|
||||
spin_unlock_irqrestore(&port->port.lock, flags);
|
||||
if (port->port.close_delay)
|
||||
msleep_interruptible(jiffies_to_msecs(port->port.close_delay));
|
||||
wake_up_interruptible(&port->port.open_wait);
|
||||
spin_lock_irqsave(&port->port.lock, flags);
|
||||
}
|
||||
port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
|
||||
wake_up_interruptible(&port->port.close_wait);
|
||||
|
||||
out:
|
||||
spin_unlock_irqrestore(&riscom_lock, flags);
|
||||
tty_port_close_end(&port->port, tty);
|
||||
}
|
||||
|
||||
static int rc_write(struct tty_struct *tty,
|
||||
|
||||
@ -833,40 +833,20 @@ static void stl_close(struct tty_struct *tty, struct file *filp)
|
||||
pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
|
||||
|
||||
portp = tty->driver_data;
|
||||
if (portp == NULL)
|
||||
return;
|
||||
BUG_ON(portp == NULL);
|
||||
|
||||
port = &portp->port;
|
||||
|
||||
spin_lock_irqsave(&port->lock, flags);
|
||||
if (tty_hung_up_p(filp)) {
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
if (tty_port_close_start(port, tty, filp) == 0)
|
||||
return;
|
||||
}
|
||||
if (tty->count == 1 && port->count != 1)
|
||||
port->count = 1;
|
||||
if (port->count-- > 1) {
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
return;
|
||||
}
|
||||
|
||||
port->count = 0;
|
||||
port->flags |= ASYNC_CLOSING;
|
||||
|
||||
/*
|
||||
* May want to wait for any data to drain before closing. The BUSY
|
||||
* flag keeps track of whether we are still sending or not - it is
|
||||
* very accurate for the cd1400, not quite so for the sc26198.
|
||||
* (The sc26198 has no "end-of-data" interrupt only empty FIFO)
|
||||
*/
|
||||
tty->closing = 1;
|
||||
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
|
||||
if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
|
||||
tty_wait_until_sent(tty, portp->closing_wait);
|
||||
stl_waituntilsent(tty, (HZ / 2));
|
||||
|
||||
|
||||
spin_lock_irqsave(&port->lock, flags);
|
||||
portp->port.flags &= ~ASYNC_INITIALIZED;
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
@ -883,20 +863,9 @@ static void stl_close(struct tty_struct *tty, struct file *filp)
|
||||
portp->tx.head = NULL;
|
||||
portp->tx.tail = NULL;
|
||||
}
|
||||
set_bit(TTY_IO_ERROR, &tty->flags);
|
||||
tty_ldisc_flush(tty);
|
||||
|
||||
tty->closing = 0;
|
||||
tty_port_close_end(port, tty);
|
||||
tty_port_tty_set(port, NULL);
|
||||
|
||||
if (port->blocked_open) {
|
||||
if (portp->close_delay)
|
||||
msleep_interruptible(jiffies_to_msecs(portp->close_delay));
|
||||
wake_up_interruptible(&portp->port.open_wait);
|
||||
}
|
||||
|
||||
portp->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
|
||||
wake_up_interruptible(&port->close_wait);
|
||||
}
|
||||
|
||||
/*****************************************************************************/
|
||||
|
||||
@ -3105,69 +3105,17 @@ static void mgsl_close(struct tty_struct *tty, struct file * filp)
|
||||
printk("%s(%d):mgsl_close(%s) entry, count=%d\n",
|
||||
__FILE__,__LINE__, info->device_name, info->port.count);
|
||||
|
||||
if (!info->port.count)
|
||||
return;
|
||||
|
||||
if (tty_hung_up_p(filp))
|
||||
if (tty_port_close_start(&info->port, tty, filp) == 0)
|
||||
goto cleanup;
|
||||
|
||||
if ((tty->count == 1) && (info->port.count != 1)) {
|
||||
/*
|
||||
* tty->count is 1 and the tty structure will be freed.
|
||||
* info->port.count should be one in this case.
|
||||
* if it's not, correct it so that the port is shutdown.
|
||||
*/
|
||||
printk("mgsl_close: bad refcount; tty->count is 1, "
|
||||
"info->port.count is %d\n", info->port.count);
|
||||
info->port.count = 1;
|
||||
}
|
||||
|
||||
info->port.count--;
|
||||
|
||||
/* if at least one open remaining, leave hardware active */
|
||||
if (info->port.count)
|
||||
goto cleanup;
|
||||
|
||||
info->port.flags |= ASYNC_CLOSING;
|
||||
|
||||
/* set tty->closing to notify line discipline to
|
||||
* only process XON/XOFF characters. Only the N_TTY
|
||||
* discipline appears to use this (ppp does not).
|
||||
*/
|
||||
tty->closing = 1;
|
||||
|
||||
/* wait for transmit data to clear all layers */
|
||||
|
||||
if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) {
|
||||
if (debug_level >= DEBUG_LEVEL_INFO)
|
||||
printk("%s(%d):mgsl_close(%s) calling tty_wait_until_sent\n",
|
||||
__FILE__,__LINE__, info->device_name );
|
||||
tty_wait_until_sent(tty, info->port.closing_wait);
|
||||
}
|
||||
|
||||
if (info->port.flags & ASYNC_INITIALIZED)
|
||||
mgsl_wait_until_sent(tty, info->timeout);
|
||||
|
||||
mgsl_flush_buffer(tty);
|
||||
|
||||
tty_ldisc_flush(tty);
|
||||
|
||||
shutdown(info);
|
||||
|
||||
tty->closing = 0;
|
||||
tty_port_close_end(&info->port, tty);
|
||||
info->port.tty = NULL;
|
||||
|
||||
if (info->port.blocked_open) {
|
||||
if (info->port.close_delay) {
|
||||
msleep_interruptible(jiffies_to_msecs(info->port.close_delay));
|
||||
}
|
||||
wake_up_interruptible(&info->port.open_wait);
|
||||
}
|
||||
|
||||
info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
|
||||
|
||||
wake_up_interruptible(&info->port.close_wait);
|
||||
|
||||
cleanup:
|
||||
if (debug_level >= DEBUG_LEVEL_INFO)
|
||||
printk("%s(%d):mgsl_close(%s) exit, count=%d\n", __FILE__,__LINE__,
|
||||
|
||||
@ -720,44 +720,9 @@ static void close(struct tty_struct *tty, struct file *filp)
|
||||
return;
|
||||
DBGINFO(("%s close entry, count=%d\n", info->device_name, info->port.count));
|
||||
|
||||
if (!info->port.count)
|
||||
return;
|
||||
|
||||
if (tty_hung_up_p(filp))
|
||||
if (tty_port_close_start(&info->port, tty, filp) == 0)
|
||||
goto cleanup;
|
||||
|
||||
if ((tty->count == 1) && (info->port.count != 1)) {
|
||||
/*
|
||||
* tty->count is 1 and the tty structure will be freed.
|
||||
* info->port.count should be one in this case.
|
||||
* if it's not, correct it so that the port is shutdown.
|
||||
*/
|
||||
DBGERR(("%s close: bad refcount; tty->count=1, "
|
||||
"info->port.count=%d\n", info->device_name, info->port.count));
|
||||
info->port.count = 1;
|
||||
}
|
||||
|
||||
info->port.count--;
|
||||
|
||||
/* if at least one open remaining, leave hardware active */
|
||||
if (info->port.count)
|
||||
goto cleanup;
|
||||
|
||||
info->port.flags |= ASYNC_CLOSING;
|
||||
|
||||
/* set tty->closing to notify line discipline to
|
||||
* only process XON/XOFF characters. Only the N_TTY
|
||||
* discipline appears to use this (ppp does not).
|
||||
*/
|
||||
tty->closing = 1;
|
||||
|
||||
/* wait for transmit data to clear all layers */
|
||||
|
||||
if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) {
|
||||
DBGINFO(("%s call tty_wait_until_sent\n", info->device_name));
|
||||
tty_wait_until_sent(tty, info->port.closing_wait);
|
||||
}
|
||||
|
||||
if (info->port.flags & ASYNC_INITIALIZED)
|
||||
wait_until_sent(tty, info->timeout);
|
||||
flush_buffer(tty);
|
||||
@ -765,20 +730,8 @@ static void close(struct tty_struct *tty, struct file *filp)
|
||||
|
||||
shutdown(info);
|
||||
|
||||
tty->closing = 0;
|
||||
tty_port_close_end(&info->port, tty);
|
||||
info->port.tty = NULL;
|
||||
|
||||
if (info->port.blocked_open) {
|
||||
if (info->port.close_delay) {
|
||||
msleep_interruptible(jiffies_to_msecs(info->port.close_delay));
|
||||
}
|
||||
wake_up_interruptible(&info->port.open_wait);
|
||||
}
|
||||
|
||||
info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
|
||||
|
||||
wake_up_interruptible(&info->port.close_wait);
|
||||
|
||||
cleanup:
|
||||
DBGINFO(("%s close exit, count=%d\n", tty->driver->name, info->port.count));
|
||||
}
|
||||
|
||||
@ -810,70 +810,18 @@ static void close(struct tty_struct *tty, struct file *filp)
|
||||
printk("%s(%d):%s close() entry, count=%d\n",
|
||||
__FILE__,__LINE__, info->device_name, info->port.count);
|
||||
|
||||
if (!info->port.count)
|
||||
return;
|
||||
|
||||
if (tty_hung_up_p(filp))
|
||||
if (tty_port_close_start(&info->port, tty, filp) == 0)
|
||||
goto cleanup;
|
||||
|
||||
if ((tty->count == 1) && (info->port.count != 1)) {
|
||||
/*
|
||||
* tty->count is 1 and the tty structure will be freed.
|
||||
* info->port.count should be one in this case.
|
||||
* if it's not, correct it so that the port is shutdown.
|
||||
*/
|
||||
printk("%s(%d):%s close: bad refcount; tty->count is 1, "
|
||||
"info->port.count is %d\n",
|
||||
__FILE__,__LINE__, info->device_name, info->port.count);
|
||||
info->port.count = 1;
|
||||
}
|
||||
|
||||
info->port.count--;
|
||||
|
||||
/* if at least one open remaining, leave hardware active */
|
||||
if (info->port.count)
|
||||
goto cleanup;
|
||||
|
||||
info->port.flags |= ASYNC_CLOSING;
|
||||
|
||||
/* set tty->closing to notify line discipline to
|
||||
* only process XON/XOFF characters. Only the N_TTY
|
||||
* discipline appears to use this (ppp does not).
|
||||
*/
|
||||
tty->closing = 1;
|
||||
|
||||
/* wait for transmit data to clear all layers */
|
||||
|
||||
if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) {
|
||||
if (debug_level >= DEBUG_LEVEL_INFO)
|
||||
printk("%s(%d):%s close() calling tty_wait_until_sent\n",
|
||||
__FILE__,__LINE__, info->device_name );
|
||||
tty_wait_until_sent(tty, info->port.closing_wait);
|
||||
}
|
||||
|
||||
if (info->port.flags & ASYNC_INITIALIZED)
|
||||
wait_until_sent(tty, info->timeout);
|
||||
|
||||
flush_buffer(tty);
|
||||
|
||||
tty_ldisc_flush(tty);
|
||||
|
||||
shutdown(info);
|
||||
|
||||
tty->closing = 0;
|
||||
tty_port_close_end(&info->port, tty);
|
||||
info->port.tty = NULL;
|
||||
|
||||
if (info->port.blocked_open) {
|
||||
if (info->port.close_delay) {
|
||||
msleep_interruptible(jiffies_to_msecs(info->port.close_delay));
|
||||
}
|
||||
wake_up_interruptible(&info->port.open_wait);
|
||||
}
|
||||
|
||||
info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
|
||||
|
||||
wake_up_interruptible(&info->port.close_wait);
|
||||
|
||||
cleanup:
|
||||
if (debug_level >= DEBUG_LEVEL_INFO)
|
||||
printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__,
|
||||
|
||||
@ -257,3 +257,61 @@ int tty_port_block_til_ready(struct tty_port *port,
|
||||
}
|
||||
EXPORT_SYMBOL(tty_port_block_til_ready);
|
||||
|
||||
int tty_port_close_start(struct tty_port *port, struct tty_struct *tty, struct file *filp)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&port->lock, flags);
|
||||
if (tty_hung_up_p(filp)) {
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if( tty->count == 1 && port->count != 1) {
|
||||
printk(KERN_WARNING
|
||||
"tty_port_close_start: tty->count = 1 port count = %d.\n",
|
||||
port->count);
|
||||
port->count = 1;
|
||||
}
|
||||
if (--port->count < 0) {
|
||||
printk(KERN_WARNING "tty_port_close_start: count = %d\n",
|
||||
port->count);
|
||||
port->count = 0;
|
||||
}
|
||||
|
||||
if (port->count) {
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
return 0;
|
||||
}
|
||||
port->flags |= ASYNC_CLOSING;
|
||||
tty->closing = 1;
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
|
||||
tty_wait_until_sent(tty, port->closing_wait);
|
||||
return 1;
|
||||
}
|
||||
EXPORT_SYMBOL(tty_port_close_start);
|
||||
|
||||
void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
tty_ldisc_flush(tty);
|
||||
|
||||
spin_lock_irqsave(&port->lock, flags);
|
||||
tty->closing = 0;
|
||||
|
||||
if (port->blocked_open) {
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
if (port->close_delay) {
|
||||
msleep_interruptible(
|
||||
jiffies_to_msecs(port->close_delay));
|
||||
}
|
||||
spin_lock_irqsave(&port->lock, flags);
|
||||
wake_up_interruptible(&port->open_wait);
|
||||
}
|
||||
port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
|
||||
wake_up_interruptible(&port->close_wait);
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
}
|
||||
EXPORT_SYMBOL(tty_port_close_end);
|
||||
|
||||
@ -59,7 +59,6 @@ struct stliport {
|
||||
unsigned int devnr;
|
||||
int baud_base;
|
||||
int custom_divisor;
|
||||
int close_delay;
|
||||
int closing_wait;
|
||||
int rc;
|
||||
int argsize;
|
||||
|
||||
@ -441,6 +441,9 @@ extern void tty_port_raise_dtr_rts(struct tty_port *port);
|
||||
extern void tty_port_hangup(struct tty_port *port);
|
||||
extern int tty_port_block_til_ready(struct tty_port *port,
|
||||
struct tty_struct *tty, struct file *filp);
|
||||
extern int tty_port_close_start(struct tty_port *port,
|
||||
struct tty_struct *tty, struct file *filp);
|
||||
extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
|
||||
|
||||
extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
|
||||
extern int tty_unregister_ldisc(int disc);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user