From 603bf524aa4cba95e4fcd64dbfffc41f804c65ab Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 17 Nov 2005 15:59:14 +0100 Subject: [PATCH] [ALSA] pcm - NULL check in snd_pcm_suspend*() Modules: PCM Midlevel Add NULL check in snd_pcm_suspend*() so that the caller doesn't have to do it by itself. Signed-off-by: Takashi Iwai --- sound/core/pcm_native.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 263c01a70fd..7bac1cbe38d 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -1073,6 +1073,9 @@ int snd_pcm_suspend(struct snd_pcm_substream *substream) int err; unsigned long flags; + if (! substream) + return 0; + snd_pcm_stream_lock_irqsave(substream, flags); err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); snd_pcm_stream_unlock_irqrestore(substream, flags); @@ -1091,6 +1094,9 @@ int snd_pcm_suspend_all(struct snd_pcm *pcm) struct snd_pcm_substream *substream; int stream, err = 0; + if (! pcm) + return 0; + for (stream = 0; stream < 2; stream++) { for (substream = pcm->streams[stream].substream; substream; substream = substream->next) { -- 2.20.1