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V4L/DVB: s2255drv: cleanup of driver disconnect code
simplifies use of kref in driver Signed-off-by: Dean Anderson <dean@sensoray.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Dean Anderson
Mauro Carvalho Chehab
parent
f5e20c34e9
commit
ff7e22dfa1
@ -226,7 +226,6 @@ struct s2255_fmt; /*forward declaration */
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struct s2255_dev {
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int frames;
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int users[MAX_CHANNELS];
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struct mutex lock;
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struct mutex open_lock;
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int resources[MAX_CHANNELS];
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@ -367,7 +366,6 @@ static void s2255_fillbuff(struct s2255_dev *dev, struct s2255_buffer *buf,
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static int s2255_set_mode(struct s2255_dev *dev, unsigned long chn,
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struct s2255_mode *mode);
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static int s2255_board_shutdown(struct s2255_dev *dev);
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static void s2255_exit_v4l(struct s2255_dev *dev);
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static void s2255_fwload_start(struct s2255_dev *dev, int reset);
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static void s2255_destroy(struct kref *kref);
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static long s2255_vendor_req(struct s2255_dev *dev, unsigned char req,
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@ -606,7 +604,6 @@ unlock:
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return 0;
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}
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static const struct s2255_fmt *format_by_fourcc(int fourcc)
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{
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unsigned int i;
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@ -620,9 +617,6 @@ static const struct s2255_fmt *format_by_fourcc(int fourcc)
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return NULL;
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}
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/* video buffer vmalloc implementation based partly on VIVI driver which is
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* Copyright (c) 2006 by
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* Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
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@ -849,7 +843,6 @@ static int vidioc_querymenu(struct file *file, void *priv,
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return v4l2_ctrl_query_menu(qmenu, NULL, NULL);
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}
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *cap)
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{
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@ -1759,31 +1752,26 @@ static int s2255_open(struct file *file)
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int i = 0;
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int cur_channel = -1;
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int state;
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dprintk(1, "s2255: open called (dev=%s)\n",
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video_device_node_name(vdev));
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lock_kernel();
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for (i = 0; i < MAX_CHANNELS; i++) {
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for (i = 0; i < MAX_CHANNELS; i++)
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if (dev->vdev[i] == vdev) {
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cur_channel = i;
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break;
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}
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}
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if (atomic_read(&dev->fw_data->fw_state) == S2255_FW_DISCONNECTING) {
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unlock_kernel();
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printk(KERN_INFO "disconnecting\n");
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return -ENODEV;
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}
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kref_get(&dev->kref);
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/*
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* open lock necessary to prevent multiple instances
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* of v4l-conf (or other programs) from simultaneously
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* reloading firmware.
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*/
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mutex_lock(&dev->open_lock);
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dev->users[cur_channel]++;
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dprintk(4, "s2255: open_handles %d\n", dev->users[cur_channel]);
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switch (atomic_read(&dev->fw_data->fw_state)) {
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state = atomic_read(&dev->fw_data->fw_state);
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switch (state) {
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case S2255_FW_DISCONNECTING:
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mutex_unlock(&dev->open_lock);
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unlock_kernel();
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return -ENODEV;
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case S2255_FW_FAILED:
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s2255_dev_err(&dev->udev->dev,
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"firmware load failed. retrying.\n");
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@ -1794,6 +1782,8 @@ static int s2255_open(struct file *file)
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(atomic_read(&dev->fw_data->fw_state)
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== S2255_FW_DISCONNECTING)),
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msecs_to_jiffies(S2255_LOAD_TIMEOUT));
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/* state may have changed, re-read */
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state = atomic_read(&dev->fw_data->fw_state);
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break;
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case S2255_FW_NOTLOADED:
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case S2255_FW_LOADED_DSPWAIT:
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@ -1806,52 +1796,44 @@ static int s2255_open(struct file *file)
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(atomic_read(&dev->fw_data->fw_state)
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== S2255_FW_DISCONNECTING)),
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msecs_to_jiffies(S2255_LOAD_TIMEOUT));
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/* state may have changed, re-read */
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state = atomic_read(&dev->fw_data->fw_state);
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break;
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case S2255_FW_SUCCESS:
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default:
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break;
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}
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state = atomic_read(&dev->fw_data->fw_state);
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if (state != S2255_FW_SUCCESS) {
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int rc;
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switch (state) {
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case S2255_FW_FAILED:
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printk(KERN_INFO "2255 FW load failed. %d\n", state);
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rc = -ENODEV;
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break;
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case S2255_FW_DISCONNECTING:
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printk(KERN_INFO "%s: disconnecting\n", __func__);
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rc = -ENODEV;
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break;
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case S2255_FW_LOADED_DSPWAIT:
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case S2255_FW_NOTLOADED:
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printk(KERN_INFO "%s: firmware not loaded yet"
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"please try again later\n",
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__func__);
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rc = -EAGAIN;
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break;
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default:
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printk(KERN_INFO "%s: unknown state\n", __func__);
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rc = -EFAULT;
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break;
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}
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dev->users[cur_channel]--;
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mutex_unlock(&dev->open_lock);
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kref_put(&dev->kref, s2255_destroy);
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mutex_unlock(&dev->open_lock);
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/* state may have changed in above switch statement */
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switch (state) {
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case S2255_FW_SUCCESS:
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break;
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case S2255_FW_FAILED:
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printk(KERN_INFO "2255 firmware load failed.\n");
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unlock_kernel();
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return rc;
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return -ENODEV;
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case S2255_FW_DISCONNECTING:
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printk(KERN_INFO "%s: disconnecting\n", __func__);
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unlock_kernel();
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return -ENODEV;
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case S2255_FW_LOADED_DSPWAIT:
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case S2255_FW_NOTLOADED:
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printk(KERN_INFO "%s: firmware not loaded yet"
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"please try again later\n",
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__func__);
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unlock_kernel();
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return -EAGAIN;
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default:
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printk(KERN_INFO "%s: unknown state\n", __func__);
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unlock_kernel();
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return -EFAULT;
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}
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/* allocate + initialize per filehandle data */
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fh = kzalloc(sizeof(*fh), GFP_KERNEL);
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if (NULL == fh) {
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dev->users[cur_channel]--;
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mutex_unlock(&dev->open_lock);
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kref_put(&dev->kref, s2255_destroy);
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unlock_kernel();
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return -ENOMEM;
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}
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file->private_data = fh;
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fh->dev = dev;
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fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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@ -1866,9 +1848,8 @@ static int s2255_open(struct file *file)
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s2255_set_mode(dev, cur_channel, &fh->mode);
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dev->chn_configured[cur_channel] = 1;
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}
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dprintk(1, "s2255drv: open dev=%s type=%s users=%d\n",
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video_device_node_name(vdev), v4l2_type_names[type],
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dev->users[cur_channel]);
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dprintk(1, "s2255drv: open dev=%s type=%s\n",
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video_device_node_name(vdev), v4l2_type_names[type]);
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dprintk(2, "s2255drv: open: fh=0x%08lx, dev=0x%08lx, vidq=0x%08lx\n",
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(unsigned long)fh, (unsigned long)dev,
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(unsigned long)&dev->vidq[cur_channel]);
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@ -1880,8 +1861,6 @@ static int s2255_open(struct file *file)
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fh->type,
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V4L2_FIELD_INTERLACED,
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sizeof(struct s2255_buffer), fh);
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mutex_unlock(&dev->open_lock);
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unlock_kernel();
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return 0;
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}
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@ -1904,28 +1883,10 @@ static unsigned int s2255_poll(struct file *file,
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static void s2255_destroy(struct kref *kref)
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{
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struct s2255_dev *dev = to_s2255_dev(kref);
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int i;
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if (!dev) {
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printk(KERN_ERR "s2255drv: kref problem\n");
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return;
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}
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atomic_set(&dev->fw_data->fw_state, S2255_FW_DISCONNECTING);
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wake_up(&dev->fw_data->wait_fw);
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for (i = 0; i < MAX_CHANNELS; i++) {
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dev->setmode_ready[i] = 1;
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wake_up(&dev->wait_setmode[i]);
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dev->vidstatus_ready[i] = 1;
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wake_up(&dev->wait_vidstatus[i]);
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}
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mutex_lock(&dev->open_lock);
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/* reset the DSP so firmware can be reload next time */
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s2255_reset_dsppower(dev);
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s2255_exit_v4l(dev);
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/* board shutdown stops the read pipe if it is running */
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s2255_board_shutdown(dev);
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/* make sure firmware still not trying to load */
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del_timer(&dev->timer); /* only started in .probe and .open */
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if (dev->fw_data->fw_urb) {
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dprintk(2, "kill fw_urb\n");
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usb_kill_urb(dev->fw_data->fw_urb);
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@ -1936,24 +1897,22 @@ static void s2255_destroy(struct kref *kref)
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release_firmware(dev->fw_data->fw);
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kfree(dev->fw_data->pfw_data);
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kfree(dev->fw_data);
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/* reset the DSP so firmware can be reloaded next time */
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s2255_reset_dsppower(dev);
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mutex_destroy(&dev->open_lock);
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mutex_destroy(&dev->lock);
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usb_put_dev(dev->udev);
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dprintk(1, "%s", __func__);
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mutex_unlock(&dev->open_lock);
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kfree(dev);
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}
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static int s2255_close(struct file *file)
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static int s2255_release(struct file *file)
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{
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struct s2255_fh *fh = file->private_data;
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struct s2255_dev *dev = fh->dev;
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struct video_device *vdev = video_devdata(file);
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if (!dev)
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return -ENODEV;
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mutex_lock(&dev->open_lock);
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/* turn off stream */
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if (res_check(fh)) {
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if (dev->b_acquire[fh->channel])
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@ -1961,15 +1920,8 @@ static int s2255_close(struct file *file)
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videobuf_streamoff(&fh->vb_vidq);
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res_free(dev, fh);
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}
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videobuf_mmap_free(&fh->vb_vidq);
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dev->users[fh->channel]--;
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mutex_unlock(&dev->open_lock);
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kref_put(&dev->kref, s2255_destroy);
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dprintk(1, "s2255: close called (dev=%s, users=%d)\n",
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video_device_node_name(vdev), dev->users[fh->channel]);
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dprintk(1, "%s (dev=%s)\n", __func__, video_device_node_name(vdev));
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kfree(fh);
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return 0;
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}
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@ -1995,7 +1947,7 @@ static int s2255_mmap_v4l(struct file *file, struct vm_area_struct *vma)
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static const struct v4l2_file_operations s2255_fops_v4l = {
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.owner = THIS_MODULE,
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.open = s2255_open,
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.release = s2255_close,
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.release = s2255_release,
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.poll = s2255_poll,
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.ioctl = video_ioctl2, /* V4L2 ioctl handler */
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.mmap = s2255_mmap_v4l,
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@ -2031,11 +1983,19 @@ static const struct v4l2_ioctl_ops s2255_ioctl_ops = {
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.vidioc_enum_frameintervals = vidioc_enum_frameintervals,
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};
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static void s2255_video_device_release(struct video_device *vdev)
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{
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struct s2255_dev *dev = video_get_drvdata(vdev);
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video_device_release(vdev);
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kref_put(&dev->kref, s2255_destroy);
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return;
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}
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static struct video_device template = {
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.name = "s2255v",
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.fops = &s2255_fops_v4l,
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.ioctl_ops = &s2255_ioctl_ops,
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.release = video_device_release,
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.release = s2255_video_device_release,
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.tvnorms = S2255_NORMS,
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.current_norm = V4L2_STD_NTSC_M,
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};
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@ -2079,21 +2039,6 @@ static int s2255_probe_v4l(struct s2255_dev *dev)
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return ret;
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}
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static void s2255_exit_v4l(struct s2255_dev *dev)
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{
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int i;
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for (i = 0; i < MAX_CHANNELS; i++) {
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if (video_is_registered(dev->vdev[i])) {
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video_unregister_device(dev->vdev[i]);
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printk(KERN_INFO "s2255 unregistered\n");
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} else {
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video_device_release(dev->vdev[i]);
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printk(KERN_INFO "s2255 released\n");
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}
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}
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}
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/* this function moves the usb stream read pipe data
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* into the system buffers.
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* returns 0 on success, EAGAIN if more data to process( call this
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@ -2408,9 +2353,7 @@ static int s2255_board_init(struct s2255_dev *dev)
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dprintk(1, "out of memory!\n");
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return -ENOMEM;
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}
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}
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/* query the firmware */
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fw_ver = s2255_get_fx2fw(dev);
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@ -2447,7 +2390,6 @@ static int s2255_board_init(struct s2255_dev *dev)
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static int s2255_board_shutdown(struct s2255_dev *dev)
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{
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u32 i;
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dprintk(1, "S2255: board shutdown: %p", dev);
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for (i = 0; i < MAX_CHANNELS; i++) {
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@ -2640,7 +2582,6 @@ static int s2255_stop_acquire(struct s2255_dev *dev, unsigned long chn)
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static void s2255_stop_readpipe(struct s2255_dev *dev)
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{
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int j;
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if (dev == NULL) {
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s2255_dev_err(&dev->udev->dev, "invalid device\n");
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return;
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@ -2654,7 +2595,6 @@ static void s2255_stop_readpipe(struct s2255_dev *dev)
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pipe_info->state = 0;
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}
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}
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for (j = 0; j < MAX_PIPE_BUFFERS; j++) {
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struct s2255_pipeinfo *pipe_info = &dev->pipes[j];
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if (pipe_info->stream_urb) {
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@ -2703,24 +2643,22 @@ static int s2255_probe(struct usb_interface *interface,
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dev = kzalloc(sizeof(struct s2255_dev), GFP_KERNEL);
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if (dev == NULL) {
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s2255_dev_err(&interface->dev, "out of memory\n");
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goto error;
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return -ENOMEM;
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}
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kref_init(&dev->kref);
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dev->pid = id->idProduct;
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dev->fw_data = kzalloc(sizeof(struct s2255_fw), GFP_KERNEL);
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if (!dev->fw_data)
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goto error;
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goto errorFWDATA1;
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mutex_init(&dev->lock);
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mutex_init(&dev->open_lock);
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/* grab usb_device and save it */
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dev->udev = usb_get_dev(interface_to_usbdev(interface));
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if (dev->udev == NULL) {
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dev_err(&interface->dev, "null usb device\n");
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retval = -ENODEV;
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goto error;
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goto errorUDEV;
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}
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kref_init(&dev->kref);
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dprintk(1, "dev: %p, kref: %p udev %p interface %p\n", dev, &dev->kref,
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dev->udev, interface);
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dev->interface = interface;
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@ -2737,14 +2675,11 @@ static int s2255_probe(struct usb_interface *interface,
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if (!dev->read_endpoint) {
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dev_err(&interface->dev, "Could not find bulk-in endpoint\n");
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goto error;
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goto errorEP;
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}
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/* set intfdata */
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usb_set_intfdata(interface, dev);
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dprintk(100, "after intfdata %p\n", dev);
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init_timer(&dev->timer);
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dev->timer.function = s2255_timer;
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dev->timer.data = (unsigned long)dev->fw_data;
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@ -2756,21 +2691,21 @@ static int s2255_probe(struct usb_interface *interface,
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}
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dev->fw_data->fw_urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!dev->fw_data->fw_urb) {
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dev_err(&interface->dev, "out of memory!\n");
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goto error;
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goto errorFWURB;
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}
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dev->fw_data->pfw_data = kzalloc(CHUNK_SIZE, GFP_KERNEL);
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if (!dev->fw_data->pfw_data) {
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dev_err(&interface->dev, "out of memory!\n");
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goto error;
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goto errorFWDATA2;
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}
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/* load the first chunk */
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if (request_firmware(&dev->fw_data->fw,
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FIRMWARE_FILE_NAME, &dev->udev->dev)) {
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printk(KERN_ERR "sensoray 2255 failed to get firmware\n");
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goto error;
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goto errorREQFW;
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}
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/* check the firmware is valid */
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fw_size = dev->fw_data->fw->size;
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@ -2779,7 +2714,7 @@ static int s2255_probe(struct usb_interface *interface,
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if (*pdata != S2255_FW_MARKER) {
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printk(KERN_INFO "Firmware invalid.\n");
|
||||
retval = -ENODEV;
|
||||
goto error;
|
||||
goto errorFWMARKER;
|
||||
} else {
|
||||
/* make sure firmware is the latest */
|
||||
__le32 *pRel;
|
||||
@ -2789,26 +2724,53 @@ static int s2255_probe(struct usb_interface *interface,
|
||||
if (*pRel < S2255_CUR_DSP_FWVER)
|
||||
printk(KERN_INFO "s2255: f2255usb.bin out of date.\n");
|
||||
if (dev->pid == 0x2257 && *pRel < S2255_MIN_DSP_COLORFILTER)
|
||||
printk(KERN_WARNING "s2255: 2257 requires firmware 8 or above.\n");
|
||||
printk(KERN_WARNING "s2255: 2257 requires firmware %d"
|
||||
"or above.\n", S2255_MIN_DSP_COLORFILTER);
|
||||
}
|
||||
/* loads v4l specific */
|
||||
s2255_probe_v4l(dev);
|
||||
usb_reset_device(dev->udev);
|
||||
/* load 2255 board specific */
|
||||
retval = s2255_board_init(dev);
|
||||
if (retval)
|
||||
goto error;
|
||||
|
||||
goto errorBOARDINIT;
|
||||
dprintk(4, "before probe done %p\n", dev);
|
||||
spin_lock_init(&dev->slock);
|
||||
|
||||
s2255_fwload_start(dev, 0);
|
||||
/* kref for each vdev. Released on video_device_release callback */
|
||||
for (i = 0; i < MAX_CHANNELS; i++)
|
||||
kref_get(&dev->kref);
|
||||
/* loads v4l specific */
|
||||
retval = s2255_probe_v4l(dev);
|
||||
if (retval)
|
||||
goto errorV4L;
|
||||
dev_info(&interface->dev, "Sensoray 2255 detected\n");
|
||||
return 0;
|
||||
error:
|
||||
errorV4L:
|
||||
for (i = 0; i < MAX_CHANNELS; i++)
|
||||
if (dev->vdev[i] && video_is_registered(dev->vdev[i]))
|
||||
video_unregister_device(dev->vdev[i]);
|
||||
errorBOARDINIT:
|
||||
s2255_board_shutdown(dev);
|
||||
errorFWMARKER:
|
||||
release_firmware(dev->fw_data->fw);
|
||||
errorREQFW:
|
||||
kfree(dev->fw_data->pfw_data);
|
||||
errorFWDATA2:
|
||||
usb_free_urb(dev->fw_data->fw_urb);
|
||||
errorFWURB:
|
||||
del_timer(&dev->timer);
|
||||
errorEP:
|
||||
usb_put_dev(dev->udev);
|
||||
errorUDEV:
|
||||
kfree(dev->fw_data);
|
||||
mutex_destroy(&dev->open_lock);
|
||||
mutex_destroy(&dev->lock);
|
||||
errorFWDATA1:
|
||||
kfree(dev);
|
||||
printk(KERN_WARNING "Sensoray 2255 driver load failed: 0x%x\n", retval);
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
/* disconnect routine. when board is removed physically or with rmmod */
|
||||
static void s2255_disconnect(struct usb_interface *interface)
|
||||
{
|
||||
@ -2816,11 +2778,11 @@ static void s2255_disconnect(struct usb_interface *interface)
|
||||
int i;
|
||||
dprintk(1, "s2255: disconnect interface %p\n", interface);
|
||||
dev = usb_get_intfdata(interface);
|
||||
|
||||
/*
|
||||
* wake up any of the timers to allow open_lock to be
|
||||
* acquired sooner
|
||||
*/
|
||||
/* unregister each video device. */
|
||||
for (i = 0; i < MAX_CHANNELS; i++)
|
||||
if (video_is_registered(dev->vdev[i]))
|
||||
video_unregister_device(dev->vdev[i]);
|
||||
/* wake up any of our timers */
|
||||
atomic_set(&dev->fw_data->fw_state, S2255_FW_DISCONNECTING);
|
||||
wake_up(&dev->fw_data->wait_fw);
|
||||
for (i = 0; i < MAX_CHANNELS; i++) {
|
||||
@ -2829,16 +2791,9 @@ static void s2255_disconnect(struct usb_interface *interface)
|
||||
dev->vidstatus_ready[i] = 1;
|
||||
wake_up(&dev->wait_vidstatus[i]);
|
||||
}
|
||||
|
||||
mutex_lock(&dev->open_lock);
|
||||
usb_set_intfdata(interface, NULL);
|
||||
mutex_unlock(&dev->open_lock);
|
||||
|
||||
if (dev) {
|
||||
kref_put(&dev->kref, s2255_destroy);
|
||||
dprintk(1, "s2255drv: disconnect\n");
|
||||
dev_info(&interface->dev, "s2255usb now disconnected\n");
|
||||
}
|
||||
kref_put(&dev->kref, s2255_destroy);
|
||||
dev_info(&interface->dev, "%s\n", __func__);
|
||||
}
|
||||
|
||||
static struct usb_driver s2255_driver = {
|
||||
@ -2851,15 +2806,12 @@ static struct usb_driver s2255_driver = {
|
||||
static int __init usb_s2255_init(void)
|
||||
{
|
||||
int result;
|
||||
|
||||
/* register this driver with the USB subsystem */
|
||||
result = usb_register(&s2255_driver);
|
||||
|
||||
if (result)
|
||||
pr_err(KBUILD_MODNAME
|
||||
": usb_register failed. Error number %d\n", result);
|
||||
|
||||
dprintk(2, "s2255_init: done\n");
|
||||
": usb_register failed. Error number %d\n", result);
|
||||
dprintk(2, "%s\n", __func__);
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user