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ALSA: sb: Minor coding style fixes

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The handling of snd_ctl_new1() and snd_ctl_add() can be sometimes
tricky, as snd_ctl_add() automatically removes the passed object at
its error path.  The recent fix addressed an overlooked issue that is
relevant with that in SB driver code, and it can be a bit more
simplified by assigning to a temporary variable, i.e. storing to the
struct field only after the creation succeeds.

Link: https://lore.kernel.org/r/20210608140540.17885-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2021-06-08 16:04:36 +02:00
parent 10dc8ad5ff
commit 36e7b12b21
2 changed files with 14 additions and 15 deletions
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10
sound/isa/sb/emu8000.c
View file

@ -1020,6 +1020,7 @@ static const struct snd_kcontrol_new *mixer_defs[EMU8000_NUM_CONTROLS] = {
static int
snd_emu8000_create_mixer(struct snd_card *card, struct snd_emu8000 *emu)
{
struct snd_kcontrol *kctl;
int i, err = 0;
if (snd_BUG_ON(!emu || !card))
@ -1029,12 +1030,11 @@ snd_emu8000_create_mixer(struct snd_card *card, struct snd_emu8000 *emu)
memset(emu->controls, 0, sizeof(emu->controls));
for (i = 0; i < EMU8000_NUM_CONTROLS; i++) {
emu->controls[i] = snd_ctl_new1(mixer_defs[i], emu);
err = snd_ctl_add(card, emu->controls[i]);
if (err < 0) {
emu->controls[i] = NULL;
kctl = snd_ctl_new1(mixer_defs[i], emu);
err = snd_ctl_add(card, kctl);
if (err < 0)
goto __error;
}
emu->controls[i] = kctl;
}
return 0;

19
sound/isa/sb/sb16_csp.c
View file

@ -1036,6 +1036,7 @@ static const struct snd_kcontrol_new snd_sb_qsound_space = {
static int snd_sb_qsound_build(struct snd_sb_csp * p)
{
struct snd_card *card;
struct snd_kcontrol *kctl;
int err;
if (snd_BUG_ON(!p))
@ -1047,18 +1048,16 @@ static int snd_sb_qsound_build(struct snd_sb_csp * p)
spin_lock_init(&p->q_lock);
p->qsound_switch = snd_ctl_new1(&snd_sb_qsound_switch, p);
err = snd_ctl_add(card, p->qsound_switch);
if (err < 0) {
p->qsound_switch = NULL;
kctl = snd_ctl_new1(&snd_sb_qsound_switch, p);
err = snd_ctl_add(card, kctl);
if (err < 0)
goto __error;
}
p->qsound_space = snd_ctl_new1(&snd_sb_qsound_space, p);
err = snd_ctl_add(card, p->qsound_space);
if (err < 0) {
p->qsound_space = NULL;
p->qsound_switch = kctl;
kctl = snd_ctl_new1(&snd_sb_qsound_space, p);
err = snd_ctl_add(card, kctl);
if (err < 0)
goto __error;
}
p->qsound_space = kctl;
return 0;