V4L/DVB (8613): v4l: move BKL down to the driver level.
The BKL is now moved from the video_open function in v4l2-dev.c to the various drivers. It seems about a third of the drivers already has a lock of some sort protecting the open(), another third uses video_exclusive_open (yuck!) and the last third required adding the BKL in their open function. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Родитель
95f73c5b57
Коммит
d56dc61265
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@ -407,15 +407,18 @@ static int usb_dsbr100_open(struct inode *inode, struct file *file)
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{
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struct dsbr100_device *radio=video_get_drvdata(video_devdata(file));
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lock_kernel();
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radio->users = 1;
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radio->muted = 1;
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if (dsbr100_start(radio)<0) {
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warn("Radio did not start up properly");
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radio->users = 0;
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unlock_kernel();
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return -EIO;
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}
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dsbr100_setfreq(radio, radio->curfreq);
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unlock_kernel();
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return 0;
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}
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@ -1074,6 +1074,7 @@ static int si470x_fops_open(struct inode *inode, struct file *file)
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struct si470x_device *radio = video_get_drvdata(video_devdata(file));
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int retval;
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lock_kernel();
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radio->users++;
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retval = usb_autopm_get_interface(radio->intf);
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@ -1090,6 +1091,7 @@ static int si470x_fops_open(struct inode *inode, struct file *file)
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}
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done:
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unlock_kernel();
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return retval;
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}
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@ -3227,6 +3227,7 @@ static int bttv_open(struct inode *inode, struct file *file)
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dprintk(KERN_DEBUG "bttv: open minor=%d\n",minor);
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lock_kernel();
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for (i = 0; i < bttv_num; i++) {
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if (bttvs[i].video_dev &&
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bttvs[i].video_dev->minor == minor) {
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@ -3241,16 +3242,20 @@ static int bttv_open(struct inode *inode, struct file *file)
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break;
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}
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}
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if (NULL == btv)
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if (NULL == btv) {
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unlock_kernel();
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return -ENODEV;
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}
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dprintk(KERN_DEBUG "bttv%d: open called (type=%s)\n",
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btv->c.nr,v4l2_type_names[type]);
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/* allocate per filehandle data */
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fh = kmalloc(sizeof(*fh),GFP_KERNEL);
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if (NULL == fh)
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if (NULL == fh) {
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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 = btv->init;
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fh->type = type;
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@ -3290,6 +3295,7 @@ static int bttv_open(struct inode *inode, struct file *file)
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bttv_vbi_fmt_reset(&fh->vbi_fmt, btv->tvnorm);
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bttv_field_count(btv);
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unlock_kernel();
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return 0;
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}
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@ -3430,21 +3436,26 @@ static int radio_open(struct inode *inode, struct file *file)
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dprintk("bttv: open minor=%d\n",minor);
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lock_kernel();
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for (i = 0; i < bttv_num; i++) {
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if (bttvs[i].radio_dev && bttvs[i].radio_dev->minor == minor) {
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btv = &bttvs[i];
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break;
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}
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}
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if (NULL == btv)
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if (NULL == btv) {
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unlock_kernel();
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return -ENODEV;
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}
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dprintk("bttv%d: open called (radio)\n",btv->c.nr);
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/* allocate per filehandle data */
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fh = kmalloc(sizeof(*fh), GFP_KERNEL);
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if (NULL == fh)
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if (NULL == fh) {
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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 = btv->init;
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v4l2_prio_open(&btv->prio, &fh->prio);
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@ -3457,6 +3468,7 @@ static int radio_open(struct inode *inode, struct file *file)
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audio_input(btv,TVAUDIO_INPUT_RADIO);
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mutex_unlock(&btv->lock);
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unlock_kernel();
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return 0;
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}
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@ -1476,9 +1476,12 @@ static int cafe_v4l_open(struct inode *inode, struct file *filp)
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{
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struct cafe_camera *cam;
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lock_kernel();
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cam = cafe_find_dev(iminor(inode));
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if (cam == NULL)
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if (cam == NULL) {
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unlock_kernel();
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return -ENODEV;
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}
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filp->private_data = cam;
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mutex_lock(&cam->s_mutex);
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@ -1490,6 +1493,7 @@ static int cafe_v4l_open(struct inode *inode, struct file *filp)
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}
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(cam->users)++;
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mutex_unlock(&cam->s_mutex);
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unlock_kernel();
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return 0;
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}
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@ -1583,6 +1583,7 @@ static int mpeg_open(struct inode *inode, struct file *file)
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dprintk(2, "%s()\n", __func__);
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lock_kernel();
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list_for_each(list, &cx23885_devlist) {
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h = list_entry(list, struct cx23885_dev, devlist);
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if (h->v4l_device->minor == minor) {
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@ -1591,13 +1592,17 @@ static int mpeg_open(struct inode *inode, struct file *file)
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}
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}
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if (dev == NULL)
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if (dev == NULL) {
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unlock_kernel();
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return -ENODEV;
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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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if (NULL == fh) {
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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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@ -1608,6 +1613,7 @@ static int mpeg_open(struct inode *inode, struct file *file)
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V4L2_FIELD_INTERLACED,
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sizeof(struct cx23885_buffer),
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fh);
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unlock_kernel();
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return 0;
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}
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@ -731,6 +731,7 @@ static int video_open(struct inode *inode, struct file *file)
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enum v4l2_buf_type type = 0;
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int radio = 0;
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lock_kernel();
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list_for_each(list, &cx23885_devlist) {
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h = list_entry(list, struct cx23885_dev, devlist);
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if (h->video_dev->minor == minor) {
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@ -748,16 +749,20 @@ static int video_open(struct inode *inode, struct file *file)
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dev = h;
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}
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}
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if (NULL == dev)
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if (NULL == dev) {
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unlock_kernel();
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return -ENODEV;
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}
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dprintk(1, "open minor=%d radio=%d type=%s\n",
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minor, radio, v4l2_type_names[type]);
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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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if (NULL == fh) {
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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->radio = radio;
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@ -775,6 +780,7 @@ static int video_open(struct inode *inode, struct file *file)
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dprintk(1, "post videobuf_queue_init()\n");
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unlock_kernel();
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return 0;
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}
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@ -1057,12 +1057,15 @@ static int mpeg_open(struct inode *inode, struct file *file)
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struct cx8802_driver *drv = NULL;
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int err;
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lock_kernel();
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dev = cx8802_get_device(inode);
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dprintk( 1, "%s\n", __func__);
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if (dev == NULL)
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if (dev == NULL) {
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unlock_kernel();
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return -ENODEV;
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}
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/* Make sure we can acquire the hardware */
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drv = cx8802_get_driver(dev, CX88_MPEG_BLACKBIRD);
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@ -1077,6 +1080,7 @@ static int mpeg_open(struct inode *inode, struct file *file)
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if (blackbird_initialize_codec(dev) < 0) {
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if (drv)
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drv->request_release(drv);
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unlock_kernel();
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return -EINVAL;
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}
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dprintk(1,"open minor=%d\n",minor);
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@ -1086,6 +1090,7 @@ static int mpeg_open(struct inode *inode, struct file *file)
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if (NULL == fh) {
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if (drv)
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drv->request_release(drv);
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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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@ -1101,6 +1106,7 @@ static int mpeg_open(struct inode *inode, struct file *file)
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/* FIXME: locking against other video device */
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cx88_set_scale(dev->core, dev->width, dev->height,
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fh->mpegq.field);
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unlock_kernel();
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return 0;
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}
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@ -773,6 +773,7 @@ static int video_open(struct inode *inode, struct file *file)
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enum v4l2_buf_type type = 0;
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int radio = 0;
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lock_kernel();
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list_for_each_entry(h, &cx8800_devlist, devlist) {
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if (h->video_dev->minor == minor) {
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dev = h;
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@ -788,8 +789,10 @@ static int video_open(struct inode *inode, struct file *file)
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dev = h;
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}
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}
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if (NULL == dev)
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if (NULL == dev) {
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unlock_kernel();
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return -ENODEV;
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}
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core = dev->core;
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@ -798,8 +801,10 @@ static int video_open(struct inode *inode, struct file *file)
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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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if (NULL == fh) {
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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->radio = radio;
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@ -832,6 +837,7 @@ static int video_open(struct inode *inode, struct file *file)
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cx88_set_stereo(core,V4L2_TUNER_MODE_STEREO,1);
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cx88_call_i2c_clients(core,AUDC_SET_RADIO,NULL);
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}
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unlock_kernel();
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return 0;
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}
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@ -1512,6 +1512,7 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
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struct em28xx_fh *fh;
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enum v4l2_buf_type fh_type = 0;
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lock_kernel();
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list_for_each_entry(h, &em28xx_devlist, devlist) {
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if (h->vdev->minor == minor) {
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dev = h;
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@ -1527,8 +1528,10 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
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dev = h;
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}
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}
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if (NULL == dev)
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if (NULL == dev) {
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unlock_kernel();
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return -ENODEV;
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}
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em28xx_videodbg("open minor=%d type=%s users=%d\n",
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minor, v4l2_type_names[fh_type], dev->users);
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@ -1537,6 +1540,7 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
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fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
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if (!fh) {
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em28xx_errdev("em28xx-video.c: Out of memory?!\n");
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unlock_kernel();
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return -ENOMEM;
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}
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mutex_lock(&dev->lock);
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@ -1573,6 +1577,7 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
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sizeof(struct em28xx_buffer), fh);
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mutex_unlock(&dev->lock);
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unlock_kernel();
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return errCode;
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}
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@ -845,15 +845,19 @@ static int meye_open(struct inode *inode, struct file *file)
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{
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int i, err;
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lock_kernel();
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err = video_exclusive_open(inode, file);
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if (err < 0)
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if (err < 0) {
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unlock_kernel();
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return err;
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}
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mchip_hic_stop();
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if (mchip_dma_alloc()) {
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printk(KERN_ERR "meye: mchip framebuffer allocation failed\n");
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video_exclusive_release(inode, file);
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unlock_kernel();
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return -ENOBUFS;
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}
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@ -861,6 +865,7 @@ static int meye_open(struct inode *inode, struct file *file)
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meye.grab_buffer[i].state = MEYE_BUF_UNUSED;
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kfifo_reset(meye.grabq);
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kfifo_reset(meye.doneq);
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unlock_kernel();
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return 0;
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}
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@ -932,6 +932,7 @@ static int pvr2_v4l2_open(struct inode *inode, struct file *file)
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unsigned int input_cnt,idx;
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int ret = 0;
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lock_kernel();
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dip = container_of(video_devdata(file),struct pvr2_v4l2_dev,devbase);
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vp = dip->v4lp;
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@ -942,11 +943,13 @@ static int pvr2_v4l2_open(struct inode *inode, struct file *file)
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if (!pvr2_hdw_dev_ok(hdw)) {
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pvr2_trace(PVR2_TRACE_OPEN_CLOSE,
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"pvr2_v4l2_open: hardware not ready");
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unlock_kernel();
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return -EIO;
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}
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fhp = kzalloc(sizeof(*fhp),GFP_KERNEL);
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if (!fhp) {
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unlock_kernel();
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return -ENOMEM;
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}
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@ -976,6 +979,7 @@ static int pvr2_v4l2_open(struct inode *inode, struct file *file)
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fhp);
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kfree(fhp);
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unlock_kernel();
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return ret;
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}
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@ -992,6 +996,7 @@ static int pvr2_v4l2_open(struct inode *inode, struct file *file)
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"Destroying pvr_v4l2_fh id=%p (input map failure)",
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fhp);
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kfree(fhp);
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unlock_kernel();
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return -ENOMEM;
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}
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input_cnt = 0;
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@ -1015,6 +1020,7 @@ static int pvr2_v4l2_open(struct inode *inode, struct file *file)
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v4l2_prio_open(&vp->prio,&fhp->prio);
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fhp->fw_mode_flag = pvr2_hdw_cpufw_get_enabled(hdw);
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unlock_kernel();
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return 0;
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}
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@ -1457,6 +1457,7 @@ static int s2255_open(struct inode *inode, struct file *file)
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int cur_channel = -1;
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dprintk(1, "s2255: open called (minor=%d)\n", minor);
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lock_kernel();
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list_for_each(list, &s2255_devlist) {
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h = list_entry(list, struct s2255_dev, s2255_devlist);
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for (i = 0; i < MAX_CHANNELS; i++) {
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@ -1469,6 +1470,7 @@ static int s2255_open(struct inode *inode, struct file *file)
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}
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if ((NULL == dev) || (cur_channel == -1)) {
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unlock_kernel();
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dprintk(1, "s2255: openv4l no dev\n");
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return -ENODEV;
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}
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@ -1490,6 +1492,7 @@ static int s2255_open(struct inode *inode, struct file *file)
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printk(KERN_INFO "2255 FW load failed.\n");
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dev->users[cur_channel]--;
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mutex_unlock(&dev->open_lock);
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unlock_kernel();
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return -EFAULT;
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}
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} else if (atomic_read(&dev->fw_data->fw_state) == S2255_FW_NOTLOADED) {
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@ -1506,6 +1509,7 @@ static int s2255_open(struct inode *inode, struct file *file)
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"try again\n");
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dev->users[cur_channel]--;
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mutex_unlock(&dev->open_lock);
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unlock_kernel();
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return -EBUSY;
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}
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}
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@ -1515,6 +1519,7 @@ static int s2255_open(struct inode *inode, struct file *file)
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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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unlock_kernel();
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return -ENOMEM;
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}
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@ -1548,6 +1553,7 @@ static int s2255_open(struct inode *inode, struct file *file)
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kref_get(&dev->kref);
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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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@ -44,6 +44,7 @@
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/videotext.h>
|
||||
#include <linux/smp_lock.h>
|
||||
#include <linux/videodev.h>
|
||||
#include <media/v4l2-common.h>
|
||||
#include <media/v4l2-ioctl.h>
|
||||
|
@ -737,9 +738,12 @@ static int saa5246a_open(struct inode *inode, struct file *file)
|
|||
struct saa5246a_device *t = vd->priv;
|
||||
int err;
|
||||
|
||||
lock_kernel();
|
||||
err = video_exclusive_open(inode,file);
|
||||
if (err < 0)
|
||||
if (err < 0) {
|
||||
unlock_kernel();
|
||||
return err;
|
||||
}
|
||||
|
||||
if (t->client==NULL) {
|
||||
err = -ENODEV;
|
||||
|
@ -776,11 +780,13 @@ static int saa5246a_open(struct inode *inode, struct file *file)
|
|||
err = -EIO;
|
||||
goto fail;
|
||||
}
|
||||
unlock_kernel();
|
||||
|
||||
return 0;
|
||||
|
||||
fail:
|
||||
video_exclusive_release(inode,file);
|
||||
unlock_kernel();
|
||||
return err;
|
||||
}
|
||||
|
||||
|
|
|
@ -52,6 +52,7 @@
|
|||
#include <linux/ioport.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/smp_lock.h>
|
||||
#include <stdarg.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/videotext.h>
|
||||
|
@ -633,9 +634,12 @@ static int saa5249_open(struct inode *inode, struct file *file)
|
|||
struct saa5249_device *t=vd->priv;
|
||||
int err,pgbuf;
|
||||
|
||||
lock_kernel();
|
||||
err = video_exclusive_open(inode,file);
|
||||
if (err < 0)
|
||||
if (err < 0) {
|
||||
unlock_kernel();
|
||||
return err;
|
||||
}
|
||||
|
||||
if (t->client==NULL) {
|
||||
err = -ENODEV;
|
||||
|
@ -664,10 +668,12 @@ static int saa5249_open(struct inode *inode, struct file *file)
|
|||
t->is_searching[pgbuf] = false;
|
||||
}
|
||||
t->virtual_mode = false;
|
||||
unlock_kernel();
|
||||
return 0;
|
||||
|
||||
fail:
|
||||
video_exclusive_release(inode,file);
|
||||
unlock_kernel();
|
||||
return err;
|
||||
}
|
||||
|
||||
|
|
|
@ -79,9 +79,11 @@ static int ts_open(struct inode *inode, struct file *file)
|
|||
struct saa7134_dev *dev;
|
||||
int err;
|
||||
|
||||
lock_kernel();
|
||||
list_for_each_entry(dev, &saa7134_devlist, devlist)
|
||||
if (dev->empress_dev && dev->empress_dev->minor == minor)
|
||||
goto found;
|
||||
unlock_kernel();
|
||||
return -ENODEV;
|
||||
found:
|
||||
|
||||
|
@ -103,6 +105,7 @@ static int ts_open(struct inode *inode, struct file *file)
|
|||
done_up:
|
||||
mutex_unlock(&dev->empress_tsq.vb_lock);
|
||||
done:
|
||||
unlock_kernel();
|
||||
return err;
|
||||
}
|
||||
|
||||
|
|
|
@ -1330,6 +1330,8 @@ static int video_open(struct inode *inode, struct file *file)
|
|||
struct saa7134_fh *fh;
|
||||
enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
||||
int radio = 0;
|
||||
|
||||
lock_kernel();
|
||||
list_for_each_entry(dev, &saa7134_devlist, devlist) {
|
||||
if (dev->video_dev && (dev->video_dev->minor == minor))
|
||||
goto found;
|
||||
|
@ -1342,6 +1344,7 @@ static int video_open(struct inode *inode, struct file *file)
|
|||
goto found;
|
||||
}
|
||||
}
|
||||
unlock_kernel();
|
||||
return -ENODEV;
|
||||
found:
|
||||
|
||||
|
@ -1350,8 +1353,10 @@ static int video_open(struct inode *inode, struct file *file)
|
|||
|
||||
/* allocate + initialize per filehandle data */
|
||||
fh = kzalloc(sizeof(*fh),GFP_KERNEL);
|
||||
if (NULL == fh)
|
||||
if (NULL == fh) {
|
||||
unlock_kernel();
|
||||
return -ENOMEM;
|
||||
}
|
||||
file->private_data = fh;
|
||||
fh->dev = dev;
|
||||
fh->radio = radio;
|
||||
|
@ -1384,6 +1389,7 @@ static int video_open(struct inode *inode, struct file *file)
|
|||
/* switch to video/vbi mode */
|
||||
video_mux(dev,dev->ctl_input);
|
||||
}
|
||||
unlock_kernel();
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
@ -936,14 +936,18 @@ static int se401_open(struct inode *inode, struct file *file)
|
|||
struct usb_se401 *se401 = (struct usb_se401 *)dev;
|
||||
int err = 0;
|
||||
|
||||
if (se401->user)
|
||||
lock_kernel();
|
||||
if (se401->user) {
|
||||
unlock_kernel();
|
||||
return -EBUSY;
|
||||
}
|
||||
se401->fbuf = rvmalloc(se401->maxframesize * SE401_NUMFRAMES);
|
||||
if (se401->fbuf)
|
||||
file->private_data = dev;
|
||||
else
|
||||
err = -ENOMEM;
|
||||
se401->user = !err;
|
||||
unlock_kernel();
|
||||
|
||||
return err;
|
||||
}
|
||||
|
|
|
@ -689,11 +689,15 @@ static int v4l_stk_open(struct inode *inode, struct file *fp)
|
|||
vdev = video_devdata(fp);
|
||||
dev = vdev_to_camera(vdev);
|
||||
|
||||
if (dev == NULL || !is_present(dev))
|
||||
lock_kernel();
|
||||
if (dev == NULL || !is_present(dev)) {
|
||||
unlock_kernel();
|
||||
return -ENXIO;
|
||||
}
|
||||
fp->private_data = vdev;
|
||||
kref_get(&dev->kref);
|
||||
usb_autopm_get_interface(dev->interface);
|
||||
unlock_kernel();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
@ -1882,12 +1882,16 @@ static int saa_open(struct inode *inode, struct file *file)
|
|||
struct video_device *vdev = video_devdata(file);
|
||||
struct saa7146 *saa = container_of(vdev, struct saa7146, video_dev);
|
||||
|
||||
lock_kernel();
|
||||
file->private_data = saa;
|
||||
|
||||
saa->user++;
|
||||
if (saa->user > 1)
|
||||
if (saa->user > 1) {
|
||||
unlock_kernel();
|
||||
return 0; /* device open already, don't reset */
|
||||
}
|
||||
saa->writemode = VID_WRITE_MPEG_VID; /* default to video */
|
||||
unlock_kernel();
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
@ -1086,6 +1086,7 @@ static int stv_open (struct inode *inode, struct file *file)
|
|||
int err = 0;
|
||||
|
||||
/* we are called with the BKL held */
|
||||
lock_kernel();
|
||||
stv680->user = 1;
|
||||
err = stv_init (stv680); /* main initialization routine for camera */
|
||||
|
||||
|
@ -1099,6 +1100,7 @@ static int stv_open (struct inode *inode, struct file *file)
|
|||
}
|
||||
if (err)
|
||||
stv680->user = 0;
|
||||
unlock_kernel();
|
||||
|
||||
return err;
|
||||
}
|
||||
|
|
|
@ -488,20 +488,24 @@ vicam_open(struct inode *inode, struct file *file)
|
|||
* rely on this fact forever.
|
||||
*/
|
||||
|
||||
lock_kernel();
|
||||
if (cam->open_count > 0) {
|
||||
printk(KERN_INFO
|
||||
"vicam_open called on already opened camera");
|
||||
unlock_kernel();
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
cam->raw_image = kmalloc(VICAM_MAX_READ_SIZE, GFP_KERNEL);
|
||||
if (!cam->raw_image) {
|
||||
unlock_kernel();
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
cam->framebuf = rvmalloc(VICAM_MAX_FRAME_SIZE * VICAM_FRAMES);
|
||||
if (!cam->framebuf) {
|
||||
kfree(cam->raw_image);
|
||||
unlock_kernel();
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
|
@ -509,6 +513,7 @@ vicam_open(struct inode *inode, struct file *file)
|
|||
if (!cam->cntrlbuf) {
|
||||
kfree(cam->raw_image);
|
||||
rvfree(cam->framebuf, VICAM_MAX_FRAME_SIZE * VICAM_FRAMES);
|
||||
unlock_kernel();
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
|
@ -526,6 +531,7 @@ vicam_open(struct inode *inode, struct file *file)
|
|||
cam->open_count++;
|
||||
|
||||
file->private_data = cam;
|
||||
unlock_kernel();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
@ -367,6 +367,7 @@ static int usbvision_v4l2_open(struct inode *inode, struct file *file)
|
|||
|
||||
PDEBUG(DBG_IO, "open");
|
||||
|
||||
lock_kernel();
|
||||
usbvision_reset_powerOffTimer(usbvision);
|
||||
|
||||
if (usbvision->user)
|
||||
|
@ -424,6 +425,7 @@ static int usbvision_v4l2_open(struct inode *inode, struct file *file)
|
|||
usbvision_empty_framequeues(usbvision);
|
||||
|
||||
PDEBUG(DBG_IO, "success");
|
||||
unlock_kernel();
|
||||
return errCode;
|
||||
}
|
||||
|
||||
|
|
|
@ -116,7 +116,6 @@ static int video_open(struct inode *inode, struct file *file)
|
|||
|
||||
if (minor >= VIDEO_NUM_DEVICES)
|
||||
return -ENODEV;
|
||||
lock_kernel();
|
||||
mutex_lock(&videodev_lock);
|
||||
vfl = video_device[minor];
|
||||
if (vfl == NULL) {
|
||||
|
@ -126,7 +125,6 @@ static int video_open(struct inode *inode, struct file *file)
|
|||
vfl = video_device[minor];
|
||||
if (vfl == NULL) {
|
||||
mutex_unlock(&videodev_lock);
|
||||
unlock_kernel();
|
||||
return -ENODEV;
|
||||
}
|
||||
}
|
||||
|
@ -140,7 +138,6 @@ static int video_open(struct inode *inode, struct file *file)
|
|||
}
|
||||
fops_put(old_fops);
|
||||
mutex_unlock(&videodev_lock);
|
||||
unlock_kernel();
|
||||
return err;
|
||||
}
|
||||
|
||||
|
|
|
@ -898,9 +898,11 @@ static int vivi_open(struct inode *inode, struct file *file)
|
|||
|
||||
printk(KERN_DEBUG "vivi: open called (minor=%d)\n", minor);
|
||||
|
||||
lock_kernel();
|
||||
list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
|
||||
if (dev->vfd->minor == minor)
|
||||
goto found;
|
||||
unlock_kernel();
|
||||
return -ENODEV;
|
||||
|
||||
found:
|
||||
|
@ -925,8 +927,10 @@ found:
|
|||
}
|
||||
unlock:
|
||||
mutex_unlock(&dev->mutex);
|
||||
if (retval)
|
||||
if (retval) {
|
||||
unlock_kernel();
|
||||
return retval;
|
||||
}
|
||||
|
||||
file->private_data = fh;
|
||||
fh->dev = dev;
|
||||
|
@ -955,6 +959,7 @@ unlock:
|
|||
sizeof(struct vivi_buffer), fh);
|
||||
|
||||
vivi_start_thread(fh);
|
||||
unlock_kernel();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
@ -1211,6 +1211,7 @@ zoran_open (struct inode *inode,
|
|||
struct zoran_fh *fh;
|
||||
int i, res, first_open = 0, have_module_locks = 0;
|
||||
|
||||
lock_kernel();
|
||||
/* find the device */
|
||||
for (i = 0; i < zoran_num; i++) {
|
||||
if (zoran[i]->video_dev->minor == minor) {
|
||||
|
@ -1321,6 +1322,7 @@ zoran_open (struct inode *inode,
|
|||
file->private_data = fh;
|
||||
fh->zr = zr;
|
||||
zoran_open_init_session(file);
|
||||
unlock_kernel();
|
||||
|
||||
return 0;
|
||||
|
||||
|
@ -1338,6 +1340,7 @@ open_unlock_and_return:
|
|||
if (zr) {
|
||||
/*mutex_unlock(&zr->resource_lock);*/
|
||||
}
|
||||
unlock_kernel();
|
||||
|
||||
return res;
|
||||
}
|
||||
|
|
|
@ -643,14 +643,18 @@ static int zr364xx_open(struct inode *inode, struct file *file)
|
|||
|
||||
cam->skip = 2;
|
||||
|
||||
lock_kernel();
|
||||
err = video_exclusive_open(inode, file);
|
||||
if (err < 0)
|
||||
if (err < 0) {
|
||||
unlock_kernel();
|
||||
return err;
|
||||
}
|
||||
|
||||
if (!cam->framebuf) {
|
||||
cam->framebuf = vmalloc_32(MAX_FRAME_SIZE * FRAMES);
|
||||
if (!cam->framebuf) {
|
||||
info("vmalloc_32 failed!");
|
||||
unlock_kernel();
|
||||
return -ENOMEM;
|
||||
}
|
||||
}
|
||||
|
@ -664,6 +668,7 @@ static int zr364xx_open(struct inode *inode, struct file *file)
|
|||
if (err < 0) {
|
||||
info("error during open sequence: %d", i);
|
||||
mutex_unlock(&cam->lock);
|
||||
unlock_kernel();
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
@ -676,6 +681,7 @@ static int zr364xx_open(struct inode *inode, struct file *file)
|
|||
mdelay(100);
|
||||
|
||||
mutex_unlock(&cam->lock);
|
||||
unlock_kernel();
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
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Ссылка в новой задаче