ALSA: oss: consolidate kmalloc/memset 0 call to kzalloc

BugLink: http://bugs.launchpad.net/bugs/1768429

commit 46325371 upstream.

This is an API consolidation only. The use of kmalloc + memset to 0
is equivalent to kzalloc.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

sound/core/oss/pcm_oss.c

@@ -853,7 +853,7 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
 			return -EAGAIN;
 	} else if (mutex_lock_interruptible(&runtime->oss.params_lock))
 		return -EINTR;
-	sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
+	sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
 	params = kmalloc(sizeof(*params), GFP_KERNEL);
 	sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 	if (!sw_params || !params || !sparams) {
@@ -991,7 +991,6 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
 		goto failure;
 	}
 
-	memset(sw_params, 0, sizeof(*sw_params));
 	if (runtime->oss.trigger) {
 		sw_params->start_threshold = 1;
 	} else {