diff options
| -rw-r--r-- | drivers/media/dvb-core/dmxdev.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/media/dvb-core/dmxdev.c b/drivers/media/dvb-core/dmxdev.c index 9a2a3eacc746..45e91add73ba 100644 --- a/drivers/media/dvb-core/dmxdev.c +++ b/drivers/media/dvb-core/dmxdev.c @@ -147,6 +147,7 @@ static int dvb_dvr_open(struct inode *inode, struct file *file) if ((file->f_flags & O_ACCMODE) == O_RDONLY) { void *mem; + if (!dvbdev->readers) { mutex_unlock(&dmxdev->mutex); return -EBUSY; @@ -198,6 +199,7 @@ static int dvb_dvr_release(struct inode *inode, struct file *file) dvbdev->readers++; if (dmxdev->dvr_buffer.data) { void *mem = dmxdev->dvr_buffer.data; + /*memory barrier*/ mb(); spin_lock_irq(&dmxdev->lock); dmxdev->dvr_buffer.data = NULL; @@ -872,7 +874,7 @@ static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev, dvb_dmxdev_filter_stop(dmxdevfilter); dvb_dmxdev_filter_reset(dmxdevfilter); - if ((unsigned)params->pes_type > DMX_PES_OTHER) + if ((unsigned int)params->pes_type > DMX_PES_OTHER) return -EINVAL; dmxdevfilter->type = DMXDEV_TYPE_PES; @@ -1121,7 +1123,7 @@ static int dvb_demux_release(struct inode *inode, struct file *file) mutex_lock(&dmxdev->mutex); dmxdev->dvbdev->users--; - if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) { + if (dmxdev->dvbdev->users == 1 && dmxdev->exit == 1) { mutex_unlock(&dmxdev->mutex); wake_up(&dmxdev->dvbdev->wait_queue); } else @@ -1259,14 +1261,14 @@ EXPORT_SYMBOL(dvb_dmxdev_init); void dvb_dmxdev_release(struct dmxdev *dmxdev) { - dmxdev->exit=1; + dmxdev->exit = 1; if (dmxdev->dvbdev->users > 1) { wait_event(dmxdev->dvbdev->wait_queue, - dmxdev->dvbdev->users==1); + dmxdev->dvbdev->users == 1); } if (dmxdev->dvr_dvbdev->users > 1) { wait_event(dmxdev->dvr_dvbdev->wait_queue, - dmxdev->dvr_dvbdev->users==1); + dmxdev->dvr_dvbdev->users == 1); } dvb_unregister_device(dmxdev->dvbdev); |