diff options
Diffstat (limited to 'drivers/media/video/ivtv/ivtv-ioctl.c')
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-ioctl.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/media/video/ivtv/ivtv-ioctl.c b/drivers/media/video/ivtv/ivtv-ioctl.c index 2c0f2724133..2061d82653f 100644 --- a/drivers/media/video/ivtv/ivtv-ioctl.c +++ b/drivers/media/video/ivtv/ivtv-ioctl.c @@ -1446,11 +1446,15 @@ static int ivtv_decoder_ioctls(struct file *filp, unsigned int cmd, void *arg) return 0; if (nonblocking) return -EAGAIN; - /* wait for event */ + /* Wait for event. Note that serialize_lock is locked, + so to allow other processes to access the driver while + we are waiting unlock first and later lock again. */ + mutex_unlock(&itv->serialize_lock); prepare_to_wait(&itv->event_waitq, &wait, TASK_INTERRUPTIBLE); if ((itv->i_flags & (IVTV_F_I_EV_DEC_STOPPED|IVTV_F_I_EV_VSYNC)) == 0) schedule(); finish_wait(&itv->event_waitq, &wait); + mutex_lock(&itv->serialize_lock); if (signal_pending(current)) { /* return if a signal was received */ IVTV_DEBUG_INFO("User stopped wait for event\n"); @@ -1580,12 +1584,9 @@ static int ivtv_v4l2_do_ioctl(struct inode *inode, struct file *filp, return 0; } -int ivtv_v4l2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, - unsigned long arg) +static int ivtv_serialized_ioctl(struct ivtv *itv, struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg) { - struct ivtv_open_id *id = (struct ivtv_open_id *)filp->private_data; - struct ivtv *itv = id->itv; - /* Filter dvb ioctls that cannot be handled by video_usercopy */ switch (cmd) { case VIDEO_SELECT_SOURCE: @@ -1620,3 +1621,16 @@ int ivtv_v4l2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, } return video_usercopy(inode, filp, cmd, arg, ivtv_v4l2_do_ioctl); } + +int ivtv_v4l2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, + unsigned long arg) +{ + struct ivtv_open_id *id = (struct ivtv_open_id *)filp->private_data; + struct ivtv *itv = id->itv; + int res; + + mutex_lock(&itv->serialize_lock); + res = ivtv_serialized_ioctl(itv, inode, filp, cmd, arg); + mutex_unlock(&itv->serialize_lock); + return res; +} |