1 files changed, 25 insertions, 16 deletions

diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c
index 4e4c69e6cb4c..e5e749f3e0ef 100644
--- a/sound/drivers/dummy.c
+++ b/sound/drivers/dummy.c
@@ -47,9 +47,11 @@ MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
 static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
 {
         int err;
-        if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
+        err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+        if (err < 0)
                 return err;
-        if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0)
+        err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX);
+        if (err) < 0)
                 return err;
         return 0;
 }
@@ -354,6 +356,7 @@ static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream)
         if ((dpcm = new_pcm_stream(substream)) == NULL)
                 return -ENOMEM;
         runtime->private_data = dpcm;
+        /* makes the infrastructure responsible for freeing dpcm */
         runtime->private_free = snd_card_dummy_runtime_free;
         runtime->hw = snd_card_dummy_playback;
         if (substream->pcm->device & 1) {
@@ -362,10 +365,9 @@ static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream)
         }
         if (substream->pcm->device & 2)
                 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
-        if ((err = add_playback_constraints(runtime)) < 0) {
-                kfree(dpcm);
+        err = add_playback_constraints(runtime);
+        if (err < 0)
                 return err;
-        }
 
         return 0;
 }
@@ -379,6 +381,7 @@ static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream)
         if ((dpcm = new_pcm_stream(substream)) == NULL)
                 return -ENOMEM;
         runtime->private_data = dpcm;
+        /* makes the infrastructure responsible for freeing dpcm */
         runtime->private_free = snd_card_dummy_runtime_free;
         runtime->hw = snd_card_dummy_capture;
         if (substream->pcm->device == 1) {
@@ -387,10 +390,9 @@ static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream)
         }
         if (substream->pcm->device & 2)
                 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
-        if ((err = add_capture_constraints(runtime)) < 0) {
-                kfree(dpcm);
+        err = add_capture_constraints(runtime);
+        if (err < 0)
                 return err;
-        }
 
         return 0;
 }
@@ -433,8 +435,9 @@ static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
         struct snd_pcm *pcm;
         int err;
 
-        if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device,
-                               substreams, substreams, &pcm)) < 0)
+        err = snd_pcm_new(dummy->card, "Dummy PCM", device,
+                               substreams, substreams, &pcm);
+        if (err < 0)
                 return err;
         dummy->pcm = pcm;
         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
@@ -565,12 +568,14 @@ static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy)
         unsigned int idx;
         int err;
 
-        snd_assert(dummy != NULL, return -EINVAL);
+        if (snd_BUG_ON(!dummy))
+                return -EINVAL;
         spin_lock_init(&dummy->mixer_lock);
         strcpy(card->mixername, "Dummy Mixer");
 
         for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
-                if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0)
+                err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy));
+                if (err < 0)
                         return err;
         }
         return 0;
@@ -594,10 +599,12 @@ static int __devinit snd_dummy_probe(struct platform_device *devptr)
                         pcm_substreams[dev] = 1;
                 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
                         pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
-                if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0)
+                err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
+                if (err < 0)
                         goto __nodev;
         }
-        if ((err = snd_card_dummy_new_mixer(dummy)) < 0)
+        err = snd_card_dummy_new_mixer(dummy);
+        if (err < 0)
                 goto __nodev;
         strcpy(card->driver, "Dummy");
         strcpy(card->shortname, "Dummy");
@@ -605,7 +612,8 @@ static int __devinit snd_dummy_probe(struct platform_device *devptr)
 
         snd_card_set_dev(card, &devptr->dev);
 
-        if ((err = snd_card_register(card)) == 0) {
+        err = snd_card_register(card);
+        if (err == 0) {
                 platform_set_drvdata(devptr, card);
                 return 0;
         }
@@ -668,7 +676,8 @@ static int __init alsa_card_dummy_init(void)
 {
         int i, cards, err;
 
-        if ((err = platform_driver_register(&snd_dummy_driver)) < 0)
+        err = platform_driver_register(&snd_dummy_driver);
+        if (err < 0)
                 return err;
 
         cards = 0;