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Char: cyclades, conditions cleanup
- 0 is not NULL - use unlikely to hit the icache in isr more likely - remove or comment empty if/else paths [akpm@linux-foundation.org: build fix] Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiri Slaby
Linus Torvalds
parent
9fa1b3b185
commit
f742903424
@ -1043,7 +1043,7 @@ static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
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cy_writeb(base_addr + (CyCAR << index), save_xir);
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/* if there is nowhere to put the data, discard it */
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if (info->tty == 0) {
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if (info->tty == NULL) {
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j = (readb(base_addr + (CyRIVR << index)) &
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CyIVRMask);
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if (j == CyIVRRxEx) { /* exception */
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@ -1214,7 +1214,7 @@ static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
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goto txend;
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}
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info = &cy_port[i];
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if (info->tty == 0) {
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if (info->tty == NULL) {
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cy_writeb(base_addr + (CySRER << index),
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readb(base_addr + (CySRER << index)) &
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~CyTxRdy);
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@ -1263,7 +1263,7 @@ static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
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}
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goto txdone;
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}
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if (info->xmit_buf == 0) {
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if (info->xmit_buf == NULL) {
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cy_writeb(base_addr + (CySRER << index),
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readb(base_addr + (CySRER << index)) &
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~CyTxRdy);
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@ -1304,7 +1304,6 @@ static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
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0);
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info->icount.tx++;
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char_count--;
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} else {
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}
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}
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}
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@ -1333,9 +1332,7 @@ txend:
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mdm_change = readb(base_addr + (CyMISR << index));
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mdm_status = readb(base_addr + (CyMSVR1 << index));
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if (info->tty == 0) { /* no place for data, ignore it */
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;
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} else {
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if (info->tty) {
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if (mdm_change & CyANY_DELTA) {
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/* For statistics only */
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if (mdm_change & CyDCD)
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@ -1389,10 +1386,10 @@ txend:
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}
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}
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}
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if (mdm_change & CyDSR) {
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/* if (mdm_change & CyDSR) {
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}
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if (mdm_change & CyRI) {
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}
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}*/
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}
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/* end of service */
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cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
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@ -1408,14 +1405,14 @@ txend:
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static irqreturn_t cyy_interrupt(int irq, void *dev_id)
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{
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int status;
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struct cyclades_card *cinfo;
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struct cyclades_card *cinfo = dev_id;
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void __iomem *base_addr, *card_base_addr;
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int chip;
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int index;
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int too_many;
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int had_work;
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if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
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if (unlikely(cinfo == NULL)) {
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#ifdef CY_DEBUG_INTERRUPTS
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printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
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#endif
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@ -1564,7 +1561,7 @@ cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
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info->mon.char_max = char_count;
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info->mon.char_last = char_count;
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#endif
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if (tty == 0) {
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if (tty == NULL) {
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/* flush received characters */
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new_rx_get = (new_rx_get + char_count) &
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(rx_bufsize - 1);
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@ -1650,9 +1647,8 @@ cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
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if (char_count) {
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if (tty == 0) {
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if (tty == NULL)
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goto ztxdone;
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}
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if (info->x_char) { /* send special char */
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data = info->x_char;
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@ -1731,9 +1727,9 @@ static void cyz_handle_cmd(struct cyclades_card *cinfo)
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special_count = 0;
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delta_count = 0;
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info = &cy_port[channel + cinfo->first_line];
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if ((tty = info->tty) == 0) {
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if ((tty = info->tty) == NULL)
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continue;
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}
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ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
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buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
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@ -1822,16 +1818,16 @@ static void cyz_handle_cmd(struct cyclades_card *cinfo)
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#ifdef CONFIG_CYZ_INTR
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static irqreturn_t cyz_interrupt(int irq, void *dev_id)
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{
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struct cyclades_card *cinfo;
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struct cyclades_card *cinfo = dev_id;
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if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
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if (unlikely(cinfo == NULL)) {
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#ifdef CY_DEBUG_INTERRUPTS
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printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
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#endif
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return IRQ_NONE; /* spurious interrupt */
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}
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if (!ISZLOADED(*cinfo)) {
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if (unlikely(!ISZLOADED(*cinfo))) {
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#ifdef CY_DEBUG_INTERRUPTS
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printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
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"(IRQ%d).\n", irq);
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@ -2661,8 +2657,6 @@ static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
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timeout))
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break;
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}
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} else {
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/* Nothing to do! */
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}
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/* Run one more char cycle */
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msleep_interruptible(jiffies_to_msecs(char_time * 5));
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@ -3857,8 +3851,6 @@ static int set_threshold(struct cyclades_port *info, unsigned long value)
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cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
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cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
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spin_unlock_irqrestore(&card->card_lock, flags);
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} else {
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/* Nothing to do! */
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}
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return 0;
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} /* set_threshold */
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@ -3881,10 +3873,8 @@ get_threshold(struct cyclades_port *info, unsigned long __user * value)
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tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
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return put_user(tmp, value);
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} else {
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/* Nothing to do! */
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return 0;
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}
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return 0;
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} /* get_threshold */
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static int
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@ -3918,8 +3908,6 @@ static int set_timeout(struct cyclades_port *info, unsigned long value)
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spin_lock_irqsave(&card->card_lock, flags);
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cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
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spin_unlock_irqrestore(&card->card_lock, flags);
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} else {
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/* Nothing to do! */
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}
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return 0;
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} /* set_timeout */
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@ -3941,10 +3929,8 @@ static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
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tmp = readb(base_addr + (CyRTPR << index));
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return put_user(tmp, value);
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} else {
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/* Nothing to do! */
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return 0;
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}
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return 0;
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} /* get_timeout */
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static int set_default_timeout(struct cyclades_port *info, unsigned long value)
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@ -4348,8 +4334,6 @@ static void cy_stop(struct tty_struct *tty)
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cy_writeb(base_addr + (CySRER << index),
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readb(base_addr + (CySRER << index)) & ~CyTxRdy);
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spin_unlock_irqrestore(&cinfo->card_lock, flags);
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} else {
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/* Nothing to do! */
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}
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} /* cy_stop */
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@ -4381,8 +4365,6 @@ static void cy_start(struct tty_struct *tty)
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cy_writeb(base_addr + (CySRER << index),
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readb(base_addr + (CySRER << index)) | CyTxRdy);
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spin_unlock_irqrestore(&cinfo->card_lock, flags);
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} else {
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/* Nothing to do! */
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}
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} /* cy_start */
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@ -4694,7 +4676,7 @@ static int __init cy_detect_isa(void)
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}
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/* fill the next cy_card structure available */
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for (j = 0; j < NR_CARDS; j++) {
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if (cy_card[j].base_addr == 0)
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if (cy_card[j].base_addr == NULL)
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break;
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}
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if (j == NR_CARDS) { /* no more cy_cards available */
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@ -4779,7 +4761,7 @@ static int __devinit cy_init_Ze(struct RUNTIME_9060 __iomem *cy_pci_addr0,
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/* fill the next cy_card structure available */
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for (j = 0; j < NR_CARDS; j++) {
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if (cy_card[j].base_addr == 0)
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if (cy_card[j].base_addr == NULL)
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break;
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}
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if (j == NR_CARDS) { /* no more cy_cards available */
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@ -4889,7 +4871,7 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev,
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}
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/* fill the next cy_card structure available */
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for (j = 0; j < NR_CARDS; j++) {
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if (cy_card[j].base_addr == 0)
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if (cy_card[j].base_addr == NULL)
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break;
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}
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if (j == NR_CARDS) { /* no more cy_cards available */
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@ -5039,7 +5021,7 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev,
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/* fill the next cy_card structure available */
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for (j = 0; j < NR_CARDS; j++) {
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if (cy_card[j].base_addr == 0)
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if (cy_card[j].base_addr == NULL)
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break;
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}
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if (j == NR_CARDS) { /* no more cy_cards available */
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