[PATCH 22/61] ALSA: ctxfi: Use guard() for mutex locks

[Takashi Iwai <tiwai@xxxxxxx>]

Replace the manual mutex lock/unlock pairs with guard() for code
simplification.

Only code refactoring, and no behavior change.

Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
 sound/pci/ctxfi/ctatc.c  | 28 +++++++++++++---------------
 sound/pci/ctxfi/ctvmem.c | 16 ++++++----------
 2 files changed, 19 insertions(+), 25 deletions(-)

diff --git a/sound/pci/ctxfi/ctatc.c b/sound/pci/ctxfi/ctatc.c
index 2a3e9d8ba7db..14779b383d9e 100644
--- a/sound/pci/ctxfi/ctatc.c
+++ b/sound/pci/ctxfi/ctatc.c
@@ -295,10 +295,10 @@ static int atc_pcm_playback_prepare(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 	src = apcm->src;
 	for (i = 0; i < n_amixer; i++) {
 		amixer = apcm->amixers[i];
-		mutex_lock(&atc->atc_mutex);
-		amixer->ops->setup(amixer, &src->rsc,
-					INIT_VOL, atc->pcm[i+device*2]);
-		mutex_unlock(&atc->atc_mutex);
+		scoped_guard(mutex, &atc->atc_mutex) {
+			amixer->ops->setup(amixer, &src->rsc,
+					   INIT_VOL, atc->pcm[i+device*2]);
+		}
 		src = src->ops->next_interleave(src);
 		if (!src)
 			src = apcm->src;
@@ -874,7 +874,7 @@ spdif_passthru_playback_setup(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 		return -ENOENT;
 	}
 
-	mutex_lock(&atc->atc_mutex);
+	guard(mutex)(&atc->atc_mutex);
 	dao->ops->get_spos(dao, &status);
 	if (((status >> 24) & IEC958_AES3_CON_FS) != iec958_con_fs) {
 		status &= ~(IEC958_AES3_CON_FS << 24);
@@ -884,7 +884,6 @@ spdif_passthru_playback_setup(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 	}
 	if ((rate != atc->pll_rate) && (32000 != rate))
 		err = atc_pll_init(atc, rate);
-	mutex_unlock(&atc->atc_mutex);
 
 	return err;
 }
@@ -921,13 +920,13 @@ spdif_passthru_playback_prepare(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 			src = apcm->src;
 	}
 	/* Connect to SPDIFOO */
-	mutex_lock(&atc->atc_mutex);
-	dao = container_of(atc->daios[SPDIFOO], struct dao, daio);
-	amixer = apcm->amixers[0];
-	dao->ops->set_left_input(dao, &amixer->rsc);
-	amixer = apcm->amixers[1];
-	dao->ops->set_right_input(dao, &amixer->rsc);
-	mutex_unlock(&atc->atc_mutex);
+	scoped_guard(mutex, &atc->atc_mutex) {
+		dao = container_of(atc->daios[SPDIFOO], struct dao, daio);
+		amixer = apcm->amixers[0];
+		dao->ops->set_left_input(dao, &amixer->rsc);
+		amixer = apcm->amixers[1];
+		dao->ops->set_right_input(dao, &amixer->rsc);
+	}
 
 	ct_timer_prepare(apcm->timer);
 
@@ -1115,7 +1114,7 @@ static int atc_spdif_out_passthru(struct ct_atc *atc, unsigned char state)
 	struct rsc *rscs[2] = {NULL};
 	unsigned int spos = 0;
 
-	mutex_lock(&atc->atc_mutex);
+	guard(mutex)(&atc->atc_mutex);
 	dao = container_of(atc->daios[SPDIFOO], struct dao, daio);
 	da_dsc.msr = state ? 1 : atc->msr;
 	da_dsc.passthru = state ? 1 : 0;
@@ -1133,7 +1132,6 @@ static int atc_spdif_out_passthru(struct ct_atc *atc, unsigned char state)
 	}
 	dao->ops->set_spos(dao, spos);
 	dao->ops->commit_write(dao);
-	mutex_unlock(&atc->atc_mutex);
 
 	return err;
 }
diff --git a/sound/pci/ctxfi/ctvmem.c b/sound/pci/ctxfi/ctvmem.c
index 7a805c4a58e1..823d6e240a07 100644
--- a/sound/pci/ctxfi/ctvmem.c
+++ b/sound/pci/ctxfi/ctvmem.c
@@ -29,7 +29,7 @@
 static struct ct_vm_block *
 get_vm_block(struct ct_vm *vm, unsigned int size, struct ct_atc *atc)
 {
-	struct ct_vm_block *block = NULL, *entry;
+	struct ct_vm_block *block, *entry;
 	struct list_head *pos;
 
 	size = CT_PAGE_ALIGN(size);
@@ -39,26 +39,25 @@ get_vm_block(struct ct_vm *vm, unsigned int size, struct ct_atc *atc)
 		return NULL;
 	}
 
-	mutex_lock(&vm->lock);
+	guard(mutex)(&vm->lock);
 	list_for_each(pos, &vm->unused) {
 		entry = list_entry(pos, struct ct_vm_block, list);
 		if (entry->size >= size)
 			break; /* found a block that is big enough */
 	}
 	if (pos == &vm->unused)
-		goto out;
+		return NULL;
 
 	if (entry->size == size) {
 		/* Move the vm node from unused list to used list directly */
 		list_move(&entry->list, &vm->used);
 		vm->size -= size;
-		block = entry;
-		goto out;
+		return entry;
 	}
 
 	block = kzalloc(sizeof(*block), GFP_KERNEL);
 	if (!block)
-		goto out;
+		return NULL;
 
 	block->addr = entry->addr;
 	block->size = size;
@@ -67,8 +66,6 @@ get_vm_block(struct ct_vm *vm, unsigned int size, struct ct_atc *atc)
 	entry->size -= size;
 	vm->size -= size;
 
- out:
-	mutex_unlock(&vm->lock);
 	return block;
 }
 
@@ -79,7 +76,7 @@ static void put_vm_block(struct ct_vm *vm, struct ct_vm_block *block)
 
 	block->size = CT_PAGE_ALIGN(block->size);
 
-	mutex_lock(&vm->lock);
+	guard(mutex)(&vm->lock);
 	list_del(&block->list);
 	vm->size += block->size;
 
@@ -116,7 +113,6 @@ static void put_vm_block(struct ct_vm *vm, struct ct_vm_block *block)
 		pos = pre;
 		pre = pos->prev;
 	}
-	mutex_unlock(&vm->lock);
 }
 
 /* Map host addr (kmalloced/vmalloced) to device logical addr. */
-- 
2.50.1