Oliver Endriss wrote:
> e9hack wrote:
>> Hi,
>>
>> if the video-device (saa7146 on a FF card) was open for capturing,
>> the close call doesn't release the capture buffers.
>> The attached patch may fix this problem. Possible there is more
>> cleanup necessary.
>
>> diff -r 1109998234b4 linux/drivers/media/common/saa7146_video.c
>> --- a/linux/drivers/media/common/saa7146_video.c Fri Mar 30 10:58:01
>> 2007 -0300
>> +++ b/linux/drivers/media/common/saa7146_video.c Sat Mar 31 19:50:55
>> 2007 +0200
>> @@ -1429,6 +1429,7 @@ static void video_close(struct saa7146_d
>> {
>> struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
>> struct saa7146_vv *vv = dev->vv_data;
>> + struct videobuf_queue *q = &fh->video_q;
>> int err;
>>
>> if (IS_CAPTURE_ACTIVE(fh) != 0) {
>> @@ -1436,6 +1437,11 @@ static void video_close(struct saa7146_d
>> } else if (IS_OVERLAY_ACTIVE(fh) != 0) {
>> err = saa7146_stop_preview(fh);
>> }
>> +
>> + // release all capture buffers
>> + mutex_lock(&q->lock);
>> + videobuf_read_stop(q);
>> + mutex_unlock(&q->lock);
>
> Hm, I'm not sure: Is it safe to call videobuf_read_stop()
> if capturing was never active?
I think it's safe. videobuf_read_stop() calls videobuf_queue_cancel() and frees
all buffers. If capturing was never
active, videobuf_queue_cancel() walks through an empty queue and does nothing.
But the buffers must be freed.
- Hartmut
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