diff options
| author | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-06-14 06:41:18 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-06-14 06:41:18 -0300 |
| commit | 2b3a17e6dc2b2244b9a7701b5ae8c9767a6b241b (patch) | |
| tree | 2d43910dddc74085d7ead67a9fffee8c07403d72 /linux/drivers/media/video/cx88/cx88-alsa.c | |
| parent | 5d49071dc5848b7556ed9f536a7e671dedc8884e (diff) | |
| download | mediapointer-dvb-s2-2b3a17e6dc2b2244b9a7701b5ae8c9767a6b241b.tar.gz mediapointer-dvb-s2-2b3a17e6dc2b2244b9a7701b5ae8c9767a6b241b.tar.bz2 | |
Avoids an OOPS if dev struct can't be successfully recovered
From: Mauro Carvalho Chehab <mchehab@infradead.org>
On some alsa versions, it seems that snd_pcm_substream_chip(substream)
is returning a NULL pointer. This causes an OOPS, as reported by:
https://bugs.launchpad.net/ubuntu/+source/linux-ubuntu-modules-2.6.24/+bug/212271
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/212960
This patch avoids the OOPS by not letting and open() succeed.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'linux/drivers/media/video/cx88/cx88-alsa.c')
| -rw-r--r-- | linux/drivers/media/video/cx88/cx88-alsa.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/linux/drivers/media/video/cx88/cx88-alsa.c b/linux/drivers/media/video/cx88/cx88-alsa.c index 9e87bcb98..a8e985b6f 100644 --- a/linux/drivers/media/video/cx88/cx88-alsa.c +++ b/linux/drivers/media/video/cx88/cx88-alsa.c @@ -385,6 +385,12 @@ static int snd_cx88_pcm_open(struct snd_pcm_substream *substream) struct snd_pcm_runtime *runtime = substream->runtime; int err; + if (!chip) { + printk(KERN_ERR "BUG: cx88 can't find device struct." + " Can't proceed with open\n"); + return -ENODEV; + } + err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS); if (err < 0) goto _error; |