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[media] saa7164: poll mask set incorrectly

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list_first_entry() always returns non-null here.  I think the intent was
to test whether there were any entries in the used list.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Cc: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Dan Carpenter 2010-11-24 02:36:57 -03:00 committed by Mauro Carvalho Chehab
parent 050bf0faa8
commit 061d55eb45
2 changed files with 2 additions and 10 deletions
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6
drivers/media/video/saa7164/saa7164-encoder.c
View File

@ -1246,7 +1246,6 @@ static unsigned int fops_poll(struct file *file, poll_table *wait)
struct saa7164_encoder_fh *fh =
(struct saa7164_encoder_fh *)file->private_data;
struct saa7164_port *port = fh->port;
struct saa7164_user_buffer *ubuf;
unsigned int mask = 0;
port->last_poll_msecs_diff = port->last_poll_msecs;
@ -1278,10 +1277,7 @@ static unsigned int fops_poll(struct file *file, poll_table *wait)
}
/* Pull the first buffer from the used list */
ubuf = list_first_entry(&port->list_buf_used.list,
struct saa7164_user_buffer, list);
if (ubuf)
if (!list_empty(&port->list_buf_used.list))
mask |= POLLIN | POLLRDNORM;
return mask;

6
drivers/media/video/saa7164/saa7164-vbi.c
View File

@ -1192,7 +1192,6 @@ static unsigned int fops_poll(struct file *file, poll_table *wait)
{
struct saa7164_vbi_fh *fh = (struct saa7164_vbi_fh *)file->private_data;
struct saa7164_port *port = fh->port;
struct saa7164_user_buffer *ubuf;
unsigned int mask = 0;
port->last_poll_msecs_diff = port->last_poll_msecs;
@ -1224,10 +1223,7 @@ static unsigned int fops_poll(struct file *file, poll_table *wait)
}
/* Pull the first buffer from the used list */
ubuf = list_first_entry(&port->list_buf_used.list,
struct saa7164_user_buffer, list);
if (ubuf)
if (!list_empty(&port->list_buf_used.list))
mask |= POLLIN | POLLRDNORM;
return mask;