diff options
| author | Andy Walls <awalls@radix.net> | 2008-08-22 21:03:11 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-10-12 09:36:53 -0200 |
| commit | b04bce476c57ac844962462ee4c813c44fa942cf (patch) | |
| tree | fb08a484414e6e486fd31c59c8533c46fd4b1341 /drivers/media/video/cx18/cx18-fileops.c | |
| parent | 59ba2b002265f2e862aa7f0df3f13c09ea99c4da (diff) | |
V4L/DVB (8772): cx18: Convert cx18_queue buffers member to atomic_t
cx18: Convert cx18_queue buffers member to atomic_t. This allows safe
concurrent access to check if a queue has data without having to acquire the
queue spinlock.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/cx18/cx18-fileops.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-fileops.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/video/cx18/cx18-fileops.c b/drivers/media/video/cx18/cx18-fileops.c index 2fdbfb994dd..eb0144f9556 100644 --- a/drivers/media/video/cx18/cx18-fileops.c +++ b/drivers/media/video/cx18/cx18-fileops.c @@ -223,7 +223,7 @@ static struct cx18_buffer *cx18_get_buffer(struct cx18_stream *s, int non_block, prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); /* New buffers might have become available before we were added to the waitqueue */ - if (!s->q_full.buffers) + if (!atomic_read(&s->q_full.buffers)) schedule(); finish_wait(&s->waitq, &wait); if (signal_pending(current)) { @@ -509,7 +509,7 @@ unsigned int cx18_v4l2_enc_poll(struct file *filp, poll_table *wait) CX18_DEBUG_HI_FILE("Encoder poll\n"); poll_wait(filp, &s->waitq, wait); - if (s->q_full.buffers || s->q_io.buffers) + if (atomic_read(&s->q_full.buffers) || atomic_read(&s->q_io.buffers)) return POLLIN | POLLRDNORM; if (eof) return POLLHUP; |