diff options
| author | Liam Girdwood <lrg@slimlogic.co.uk> | 2011-04-07 08:40:03 +0100 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2011-04-07 08:40:03 +0100 |
| commit | ab984dd778f785d807b1e8f32c666e6a9195a897 (patch) | |
| tree | 1f88c18a46f3230b32b18767cb55459f43619213 /sound | |
| parent | 01abc5d827bd7f80e49a7e1398aa65999604f4eb (diff) | |
ALSA: pcm: reject calls to open backend PCMs
This stops userspace opening backend PCMs.
Change-Id: Ide3df013f158a4ad49da2bfcacb91aa8f3b6970b
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/core/pcm_native.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 94433e1a103..f46591eb744 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -2029,6 +2029,12 @@ int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, goto error; } + if (substream->ops == NULL) { + snd_printd("cannot open back end PCMs directly\n"); + err = -ENODEV; + goto error; + } + if ((err = substream->ops->open(substream)) < 0) goto error; |