when usb-type tuner is pulled out, user applications did not close device's FD,
and go on polling the device, we should return POLLERR directly.
Signed-off-by: Changbing Xiong <cb.xiong@xxxxxxxxxxx>
---
drivers/media/dvb-core/dmxdev.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/media/dvb-core/dmxdev.c b/drivers/media/dvb-core/dmxdev.c
index 7a5c070..42b5e70 100755
--- a/drivers/media/dvb-core/dmxdev.c
+++ b/drivers/media/dvb-core/dmxdev.c
@@ -1085,9 +1085,10 @@ static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
{
struct dmxdev_filter *dmxdevfilter = file->private_data;
+ struct dmxdev *dmxdev = dmxdevfilter->dev;
unsigned int mask = 0;
- if (!dmxdevfilter)
+ if ((!dmxdevfilter) || (dmxdev->exit))
return POLLERR;
poll_wait(file, &dmxdevfilter->buffer.queue, wait);
@@ -1181,6 +1182,9 @@ static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
dprintk("function : %s\n", __func__);
+ if (dmxdev->exit)
+ return POLLERR;
+
poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
--
1.7.9.5
--
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