From 4d572776d4dfa2d5385a2ec3acec3cc059149e13 Mon Sep 17 00:00:00 2001 From: Jesper Juhl Date: Mon, 30 May 2005 17:30:32 +0200 Subject: [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 Signed-off-by: Takashi Iwai --- sound/usb/usbaudio.c | 12 ++++-------- sound/usb/usbmixer.c | 6 ++---- sound/usb/usx2y/usbusx2yaudio.c | 6 ++---- 3 files changed, 8 insertions(+), 16 deletions(-) (limited to 'sound/usb') diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index a82412b..a756950 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -859,10 +859,8 @@ static void release_urb_ctx(snd_urb_ctx_t *u) usb_free_urb(u->urb); u->urb = NULL; } - if (u->buf) { - kfree(u->buf); - u->buf = NULL; - } + kfree(u->buf); + u->buf = NULL; } /* @@ -880,10 +878,8 @@ static void release_substream_urbs(snd_usb_substream_t *subs, int force) release_urb_ctx(&subs->dataurb[i]); for (i = 0; i < SYNC_URBS; i++) release_urb_ctx(&subs->syncurb[i]); - if (subs->tmpbuf) { - kfree(subs->tmpbuf); - subs->tmpbuf = NULL; - } + kfree(subs->tmpbuf); + subs->tmpbuf = NULL; subs->nurbs = 0; } 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 @@ static struct usb_feature_control_info audio_feature_info[] = { /* 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; } diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c index 4c292e0..62dfd28 100644 --- a/sound/usb/usx2y/usbusx2yaudio.c +++ b/sound/usb/usx2y/usbusx2yaudio.c @@ -401,10 +401,8 @@ static void usX2Y_urbs_release(snd_usX2Y_substream_t *subs) for (i = 0; i < NRURBS; i++) usX2Y_urb_release(subs->urb + i, subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]); - if (subs->tmpbuf) { - kfree(subs->tmpbuf); - subs->tmpbuf = NULL; - } + kfree(subs->tmpbuf); + subs->tmpbuf = NULL; } /* * initialize a substream's urbs -- cgit v1.1