[02/66] ALSA: sb: Minor coding style fixes

Message ID 20210608140540.17885-3-tiwai@suse.de
State Accepted
Commit 36e7b12b219dc30a4db046756d81745bc9d69167
Headers show
Series
  • ALSA: Fix assignment in if condition
Related show

Commit Message

Takashi Iwai June 8, 2021, 2:04 p.m.
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@suse.de>
---
 sound/isa/sb/emu8000.c  | 10 +++++-----
 sound/isa/sb/sb16_csp.c | 19 +++++++++----------
 2 files changed, 14 insertions(+), 15 deletions(-)

Patch

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;