commit 4d572776d4dfa2d5385a2ec3acec3cc059149e13
author Jesper Juhl <juhl-lkml@dif.dk> Mon May 30 17:30:32 2005 +0200
committer Jaroslav Kysela <perex@suse.cz> Wed Jun 22 12:27:43 2005 +0200
tree b25ff1baa8d106561d9f07045bbfea6ac330c714
parent 6fd8b87f0e1e5de436ba020bd5806fe9ad738269

[ALSA] Remove redundant NULL checks before kfree

Timer Midlevel,ALSA sequencer,ALSA<-OSS sequencer,Digigram VX core
I2C tea6330t,GUS Library,VIA82xx driver,VIA82xx-modem driver
CA0106 driver,CS46xx driver,EMU10K1/EMU10K2 driver,YMFPCI driver
Digigram VX Pocket driver,Common EMU synth,USB generic driver,USB USX2Y
Checking a pointer for NULL before calling kfree() on it is redundant,
kfree() deals with NULL pointers just fine.
This patch removes such checks from sound/

This patch also makes another, but closely related, change.
It avoids casting pointers about to be kfree()'ed.

Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/usbmixer.c

diff --git a/sound/usb/usbmixer.c b/sound/usb/usbmixer.c
index 83ba665..e73c1c9 100644
--- a/sound/usb/usbmixer.c
+++ b/sound/usb/usbmixer.c
@@ -623,10 +623,8 @@
 /* private_free callback */
 static void usb_mixer_elem_free(snd_kcontrol_t *kctl)
 {
-	if (kctl->private_data) {
-		kfree(kctl->private_data);
-		kctl->private_data = NULL;
-	}
+	kfree(kctl->private_data);
+	kctl->private_data = NULL;
 }