ALSA: ctxfi - Simple code clean up

- replace NULL == xxx with !xxx
- replace NULL != xxx with xxx
- similar trivial cleanups

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 3 insertions, 3 deletions

diff --git a/sound/pci/ctxfi/ctpcm.c b/sound/pci/ctxfi/ctpcm.c
index 60ea23180acb..d0dc227fbdd3 100644
--- a/sound/pci/ctxfi/ctpcm.c
+++ b/sound/pci/ctxfi/ctpcm.c
@@ -97,7 +97,7 @@ static void ct_atc_pcm_interrupt(struct ct_atc_pcm *atc_pcm)
 {
         struct ct_atc_pcm *apcm = atc_pcm;
 
-        if (NULL == apcm->substream)
+        if (!apcm->substream)
                 return;
 
         snd_pcm_period_elapsed(apcm->substream);
@@ -123,7 +123,7 @@ static int ct_pcm_playback_open(struct snd_pcm_substream *substream)
         int err;
 
         apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
-        if (NULL == apcm)
+        if (!apcm)
                 return -ENOMEM;
 
         apcm->substream = substream;
@@ -271,7 +271,7 @@ static int ct_pcm_capture_open(struct snd_pcm_substream *substream)
         int err;
 
         apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
-        if (NULL == apcm)
+        if (!apcm)
                 return -ENOMEM;
 
         apcm->started = 0;