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.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
sound/isa/sb/emu8000.c | 10 +++++-----
sound/isa/sb/sb16_csp.c | 19 +++++++++----------
2 files changed, 14 insertions(+), 15 deletions(-)
diff --git a/sound/isa/sb/emu8000.c b/sound/isa/sb/emu8000.c
index 896a862a9f9c..5e4187940265 100644
--- a/sound/isa/sb/emu8000.c
+++ b/sound/isa/sb/emu8000.c
@@ -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;
diff --git a/sound/isa/sb/sb16_csp.c b/sound/isa/sb/sb16_csp.c
index d6ce6b16421c..dec68ae6b599 100644
--- a/sound/isa/sb/sb16_csp.c
+++ b/sound/isa/sb/sb16_csp.c
@@ -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;
--
2.26.2
