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[ALSA] Remove redundant NULL checks before kfree

Browse source 
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>
This commit is contained in:
Jesper Juhl 2005-05-30 17:30:32 +02:00 committed by Jaroslav Kysela
parent 6fd8b87f0e
commit 4d572776d4
18 changed files with 39 additions and 87 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
sound/core/seq/oss/seq_oss_synth.c
View file

@ -325,14 +325,10 @@ snd_seq_oss_synth_cleanup(seq_oss_devinfo_t *dp)
}
snd_use_lock_free(&rec->use_lock);
}
if (info->sysex) {
kfree(info->sysex);
info->sysex = NULL;
}
if (info->ch) {
kfree(info->ch);
info->ch = NULL;
}
kfree(info->sysex);
info->sysex = NULL;
kfree(info->ch);
info->ch = NULL;
}
dp->synth_opened = 0;
dp->max_synthdev = 0;
@ -418,14 +414,10 @@ snd_seq_oss_synth_reset(seq_oss_devinfo_t *dp, int dev)
dp->file_mode) < 0) {
midi_synth_dev.opened--;
info->opened = 0;
if (info->sysex) {
kfree(info->sysex);
info->sysex = NULL;
}
if (info->ch) {
kfree(info->ch);
info->ch = NULL;
}
kfree(info->sysex);
info->sysex = NULL;
kfree(info->ch);
info->ch = NULL;
}
return;
}

5
sound/core/seq/seq_dummy.c
View file

@ -140,10 +140,7 @@ dummy_input(snd_seq_event_t *ev, int direct, void *private_data, int atomic, int
static void
dummy_free(void *private_data)
{
snd_seq_dummy_port_t *p;
p = private_data;
kfree(p);
kfree(private_data);
}
/*

12
sound/core/timer.c
View file

@ -1469,14 +1469,10 @@ static int snd_timer_user_tselect(struct file *file, snd_timer_select_t __user *
if ((err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid)) < 0)
goto __err;
if (tu->queue) {
kfree(tu->queue);
tu->queue = NULL;
}
if (tu->tqueue) {
kfree(tu->tqueue);
tu->tqueue = NULL;
}
kfree(tu->queue);
tu->queue = NULL;
kfree(tu->tqueue);
tu->tqueue = NULL;
if (tu->tread) {
tu->tqueue = (snd_timer_tread_t *)kmalloc(tu->queue_size * sizeof(snd_timer_tread_t), GFP_KERNEL);
if (tu->tqueue == NULL)

12
sound/drivers/vx/vx_pcm.c
View file

@ -1264,14 +1264,10 @@ static void snd_vx_pcm_free(snd_pcm_t *pcm)
{
vx_core_t *chip = pcm->private_data;
chip->pcm[pcm->device] = NULL;
if (chip->playback_pipes) {
kfree(chip->playback_pipes);
chip->playback_pipes = NULL;
}
if (chip->capture_pipes) {
kfree(chip->capture_pipes);
chip->capture_pipes = NULL;
}
kfree(chip->playback_pipes);
chip->playback_pipes = NULL;
kfree(chip->capture_pipes);
chip->capture_pipes = NULL;
}
/*

3
sound/i2c/tea6330t.c
View file

@ -266,8 +266,7 @@ TEA6330T_TREBLE("Tone Control - Treble", 0)
static void snd_tea6330_free(snd_i2c_device_t *device)
{
tea6330t_t *tea = device->private_data;
kfree(tea);
kfree(device->private_data);
}
int snd_tea6330t_update_mixer(snd_card_t * card,

3
sound/isa/gus/gus_pcm.c
View file

@ -656,8 +656,7 @@ static snd_pcm_hardware_t snd_gf1_pcm_capture =
static void snd_gf1_pcm_playback_free(snd_pcm_runtime_t *runtime)
{
gus_pcm_private_t * pcmp = runtime->private_data;
kfree(pcmp);
kfree(runtime->private_data);
}
static int snd_gf1_pcm_playback_open(snd_pcm_substream_t *substream)

6
sound/pci/ca0106/ca0106_main.c
View file

@ -332,11 +332,7 @@ static void snd_ca0106_intr_enable(ca0106_t *emu, unsigned int intrenb)
static void snd_ca0106_pcm_free_substream(snd_pcm_runtime_t *runtime)
{
ca0106_pcm_t *epcm = runtime->private_data;
if (epcm) {
kfree(epcm);
}
kfree(runtime->private_data);
}
/* open_playback callback */

3
sound/pci/cs46xx/cs46xx_lib.c
View file

@ -1295,8 +1295,7 @@ static snd_pcm_hw_constraint_list_t hw_constraints_period_sizes = {
static void snd_cs46xx_pcm_free_substream(snd_pcm_runtime_t *runtime)
{
cs46xx_pcm_t * cpcm = runtime->private_data;
kfree(cpcm);
kfree(runtime->private_data);
}
static int _cs46xx_playback_open_channel (snd_pcm_substream_t * substream,int pcm_channel_id)

5
sound/pci/emu10k1/emu10k1x.c
View file

@ -361,10 +361,7 @@ static void snd_emu10k1x_gpio_write(emu10k1x_t *emu, unsigned int value)
static void snd_emu10k1x_pcm_free_substream(snd_pcm_runtime_t *runtime)
{
emu10k1x_pcm_t *epcm = runtime->private_data;
if (epcm)
kfree(epcm);
kfree(runtime->private_data);
}
static void snd_emu10k1x_pcm_interrupt(emu10k1x_t *emu, emu10k1x_voice_t *voice)

4
sound/pci/emu10k1/emupcm.c
View file

@ -991,9 +991,7 @@ static void snd_emu10k1_pcm_efx_mixer_notify(emu10k1_t *emu, int idx, int activa
static void snd_emu10k1_pcm_free_substream(snd_pcm_runtime_t *runtime)
{
emu10k1_pcm_t *epcm = runtime->private_data;
kfree(epcm);
kfree(runtime->private_data);
}
static int snd_emu10k1_efx_playback_close(snd_pcm_substream_t * substream)

6
sound/pci/via82xx.c
View file

@ -491,10 +491,8 @@ static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
snd_dma_free_pages(&dev->table);
dev->table.area = NULL;
}
if (dev->idx_table) {
kfree(dev->idx_table);
dev->idx_table = NULL;
}
kfree(dev->idx_table);
dev->idx_table = NULL;
return 0;
}

6
sound/pci/via82xx_modem.c
View file

@ -352,10 +352,8 @@ static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
snd_dma_free_pages(&dev->table);
dev->table.area = NULL;
}
if (dev->idx_table) {
kfree(dev->idx_table);
dev->idx_table = NULL;
}
kfree(dev->idx_table);
dev->idx_table = NULL;
return 0;
}

4
sound/pci/ymfpci/ymfpci_main.c
View file

@ -829,9 +829,7 @@ static snd_pcm_hardware_t snd_ymfpci_capture =
static void snd_ymfpci_pcm_free_substream(snd_pcm_runtime_t *runtime)
{
ymfpci_pcm_t *ypcm = runtime->private_data;
kfree(ypcm);
kfree(runtime->private_data);
}
static int snd_ymfpci_playback_open_1(snd_pcm_substream_t * substream)

3
sound/pcmcia/vx/vx_entry.c
View file

@ -68,8 +68,7 @@ static int snd_vxpocket_free(vx_core_t *chip)
if (hw)
hw->card_list[vxp->index] = NULL;
chip->card = NULL;
if (chip->dev)
kfree(chip->dev);
kfree(chip->dev);
snd_vx_free_firmware(chip);
kfree(chip);

6
sound/synth/emux/emux_effect.c
View file

@ -291,10 +291,8 @@ snd_emux_create_effect(snd_emux_port_t *p)
void
snd_emux_delete_effect(snd_emux_port_t *p)
{
if (p->effect) {
kfree(p->effect);
p->effect = NULL;
}
kfree(p->effect);
p->effect = NULL;
}
void

12
sound/usb/usbaudio.c
View file

@ -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;
}

6
sound/usb/usbmixer.c
View file

@ -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;
}

6
sound/usb/usx2y/usbusx2yaudio.c
View file

@ -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