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ALSA: core: fix NULL checking in snd_pcm_plug_client_size()

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The dereference snd_pcm_plug_stream(plug) should come after the NULL
check snd_BUG_ON(!plug).

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Xi Wang 2012-11-13 17:12:11 -05:00 committed by Takashi Iwai
parent 1762a59d8e
commit 9af4e7feda
1 changed files with 2 additions and 1 deletions
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3
sound/core/oss/pcm_plugin.c
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@ -199,12 +199,13 @@ int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin)
snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t drv_frames)
{
struct snd_pcm_plugin *plugin, *plugin_prev, *plugin_next;
int stream = snd_pcm_plug_stream(plug);
int stream;
if (snd_BUG_ON(!plug))
return -ENXIO;
if (drv_frames == 0)
return 0;
stream = snd_pcm_plug_stream(plug);
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
plugin = snd_pcm_plug_last(plug);
while (plugin && drv_frames > 0) {