diff options
| -rw-r--r-- | drivers/gpu/drm/drm_fops.c | 4 | ||||
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvbdev.c | 5 | ||||
| -rw-r--r-- | sound/core/sound.c | 4 |
3 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c index 3733e36..b06a537 100644 --- a/drivers/gpu/drm/drm_fops.c +++ b/drivers/gpu/drm/drm_fops.c @@ -183,6 +183,10 @@ int drm_stub_open(struct inode *inode, struct file *filp) old_fops = filp->f_op; filp->f_op = fops_get(&dev->driver->fops); + if (filp->f_op == NULL) { + filp->f_op = old_fops; + goto out; + } if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) { fops_put(filp->f_op); filp->f_op = fops_get(old_fops); diff --git a/drivers/media/dvb/dvb-core/dvbdev.c b/drivers/media/dvb/dvb-core/dvbdev.c index 65d6966..6a32680 100644 --- a/drivers/media/dvb/dvb-core/dvbdev.c +++ b/drivers/media/dvb/dvb-core/dvbdev.c @@ -79,6 +79,10 @@ static int dvb_device_open(struct inode *inode, struct file *file) file->private_data = dvbdev; old_fops = file->f_op; file->f_op = fops_get(dvbdev->fops); + if (file->f_op == NULL) { + file->f_op = old_fops; + goto fail; + } if(file->f_op->open) err = file->f_op->open(inode,file); if (err) { @@ -90,6 +94,7 @@ static int dvb_device_open(struct inode *inode, struct file *file) unlock_kernel(); return err; } +fail: up_read(&minor_rwsem); unlock_kernel(); return -ENODEV; diff --git a/sound/core/sound.c b/sound/core/sound.c index 44a69bb..7872a02 100644 --- a/sound/core/sound.c +++ b/sound/core/sound.c @@ -152,6 +152,10 @@ static int __snd_open(struct inode *inode, struct file *file) } old_fops = file->f_op; file->f_op = fops_get(mptr->f_ops); + if (file->f_op == NULL) { + file->f_op = old_fops; + return -ENODEV; + } if (file->f_op->open) err = file->f_op->open(inode, file); if (err) { |
