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[media] hdpvr: fix interrupted recording 

This is a reworking of a patch originally submitted by Ryley Angus,
modified by Hans Verkuil and then seemingly forgotten before changes
suggested by Keith Pyle here:

http://www.mail-archive.com/linux-media@vger.kernel.org/msg75163.html

were made and tested.

I have implemented the suggested changes and have been testing for the
last 2 months. I am no longer experiencing lockups while recording
(with blue light on, requiring power cycling) which had been a long
standing problem with the HD-PVR. I have not noticed any other problems
since applying the patch.

Signed-off-by: Jonathan Sims <jonathan.625266@earthlink.net>
Reported-by: Ryley Angus <ryleyjangus@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Jonathan Sims 2016-10-23 16:19:07 -02:00 committed by Mauro Carvalho Chehab
parent 708f48e76d
commit a503ff8124
1 changed files with 19 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/media/usb/hdpvr/hdpvr-video.c
View File

@ -449,6 +449,7 @@ static ssize_t hdpvr_read(struct file *file, char __user *buffer, size_t count,
if (buf->status != BUFSTAT_READY &&
dev->status != STATUS_DISCONNECTED) {
int err;
/* return nonblocking */
if (file->f_flags & O_NONBLOCK) {
if (!ret)
@ -456,9 +457,24 @@ static ssize_t hdpvr_read(struct file *file, char __user *buffer, size_t count,
goto err;
}
if (wait_event_interruptible(dev->wait_data,
buf->status == BUFSTAT_READY))
return -ERESTARTSYS;
err = wait_event_interruptible_timeout(dev->wait_data,
buf->status == BUFSTAT_READY,
msecs_to_jiffies(1000));
if (err < 0) {
ret = err;
goto err;
}
if (!err) {
v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
"timeout: restart streaming\n");
hdpvr_stop_streaming(dev);
msecs_to_jiffies(4000);
err = hdpvr_start_streaming(dev);
if (err) {
ret = err;
goto err;
}
}
}
if (buf->status != BUFSTAT_READY)