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ALSA: firewire: lib: Use guard() for mutex locks 

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

Only code refactoring, and no behavior change.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250828132802.9032-11-tiwai@suse.de
This commit is contained in:
Takashi Iwai 2025-08-28 15:27:14 +02:00
parent b8ed2b1432
commit 6061b4accb
3 changed files with 38 additions and 77 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
sound/firewire/amdtp-stream.c
View File

@ -1688,20 +1688,16 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
struct pkt_desc *descs;
int i, type, tag, err;
mutex_lock(&s->mutex);
guard(mutex)(&s->mutex);
if (WARN_ON(amdtp_stream_running(s) ||
(s->data_block_quadlets < 1))) {
err = -EBADFD;
goto err_unlock;
}
(s->data_block_quadlets < 1)))
return -EBADFD;
if (s->direction == AMDTP_IN_STREAM) {
// NOTE: IT context should be used for constant IRQ.
if (is_irq_target) {
err = -EINVAL;
goto err_unlock;
}
if (is_irq_target)
return -EINVAL;
s->data_block_counter = UINT_MAX;
} else {
@ -1725,7 +1721,7 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
err = iso_packets_buffer_init(&s->buffer, s->unit, queue_size, max_ctx_payload_size, dir);
if (err < 0)
goto err_unlock;
return err;
s->queue_size = queue_size;
s->context = fw_iso_context_create(fw_parent_device(s->unit)->card,
@ -1846,8 +1842,6 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
if (err < 0)
goto err_pkt_descs;
mutex_unlock(&s->mutex);
return 0;
err_pkt_descs:
kfree(s->packet_descs);
@ -1863,8 +1857,6 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
s->context = ERR_PTR(-1);
err_buffer:
iso_packets_buffer_destroy(&s->buffer, s->unit);
err_unlock:
mutex_unlock(&s->mutex);
return err;
}
@ -1934,12 +1926,10 @@ EXPORT_SYMBOL(amdtp_stream_update);
*/
static void amdtp_stream_stop(struct amdtp_stream *s)
{
mutex_lock(&s->mutex);
guard(mutex)(&s->mutex);
if (!amdtp_stream_running(s)) {
mutex_unlock(&s->mutex);
if (!amdtp_stream_running(s))
return;
}
cancel_work_sync(&s->period_work);
fw_iso_context_stop(s->context);
@ -1955,8 +1945,6 @@ static void amdtp_stream_stop(struct amdtp_stream *s)
if (s->domain->replay.enable)
kfree(s->ctx_data.tx.cache.descs);
}
mutex_unlock(&s->mutex);
}
/**

35
sound/firewire/cmp.c
View File

@ -188,32 +188,23 @@ EXPORT_SYMBOL(cmp_connection_destroy);
int cmp_connection_reserve(struct cmp_connection *c,
unsigned int max_payload_bytes)
{
int err;
guard(mutex)(&c->mutex);
mutex_lock(&c->mutex);
if (WARN_ON(c->resources.allocated)) {
err = -EBUSY;
goto end;
}
if (WARN_ON(c->resources.allocated))
return -EBUSY;
c->speed = min(c->max_speed,
fw_parent_device(c->resources.unit)->max_speed);
err = fw_iso_resources_allocate(&c->resources, max_payload_bytes,
return fw_iso_resources_allocate(&c->resources, max_payload_bytes,
c->speed);
end:
mutex_unlock(&c->mutex);
return err;
}
EXPORT_SYMBOL(cmp_connection_reserve);
void cmp_connection_release(struct cmp_connection *c)
{
mutex_lock(&c->mutex);
guard(mutex)(&c->mutex);
fw_iso_resources_free(&c->resources);
mutex_unlock(&c->mutex);
}
EXPORT_SYMBOL(cmp_connection_release);
@ -304,12 +295,10 @@ int cmp_connection_establish(struct cmp_connection *c)
{
int err;
mutex_lock(&c->mutex);
guard(mutex)(&c->mutex);
if (WARN_ON(c->connected)) {
mutex_unlock(&c->mutex);
if (WARN_ON(c->connected))
return -EISCONN;
}
retry_after_bus_reset:
if (c->direction == CMP_OUTPUT)
@ -327,8 +316,6 @@ int cmp_connection_establish(struct cmp_connection *c)
if (err >= 0)
c->connected = true;
mutex_unlock(&c->mutex);
return err;
}
EXPORT_SYMBOL(cmp_connection_establish);
@ -350,19 +337,15 @@ void cmp_connection_break(struct cmp_connection *c)
{
int err;
mutex_lock(&c->mutex);
guard(mutex)(&c->mutex);
if (!c->connected) {
mutex_unlock(&c->mutex);
if (!c->connected)
return;
}
err = pcr_modify(c, pcr_break_modify, NULL, SUCCEED_ON_BUS_RESET);
if (err < 0)
cmp_error(c, "plug is still connected\n");
c->connected = false;
mutex_unlock(&c->mutex);
}
EXPORT_SYMBOL(cmp_connection_break);

22
sound/firewire/iso-resources.c
View File

@ -123,15 +123,12 @@ int fw_iso_resources_allocate(struct fw_iso_resources *r,
if (err < 0)
return err;
mutex_lock(&r->mutex);
scoped_guard(mutex, &r->mutex) {
bandwidth = r->bandwidth + r->bandwidth_overhead;
fw_iso_resource_manage(card, r->generation, r->channels_mask,
&channel, &bandwidth, true);
if (channel == -EAGAIN) {
mutex_unlock(&r->mutex);
if (channel == -EAGAIN)
goto retry_after_bus_reset;
}
if (channel >= 0) {
r->channel = channel;
r->allocated = true;
@ -143,8 +140,7 @@ int fw_iso_resources_allocate(struct fw_iso_resources *r,
dev_err(&r->unit->device,
"isochronous resource allocation failed\n");
}
mutex_unlock(&r->mutex);
}
return channel;
}
@ -166,12 +162,10 @@ int fw_iso_resources_update(struct fw_iso_resources *r)
struct fw_card *card = fw_parent_device(r->unit)->card;
int bandwidth, channel;
mutex_lock(&r->mutex);
guard(mutex)(&r->mutex);
if (!r->allocated) {
mutex_unlock(&r->mutex);
if (!r->allocated)
return 0;
}
spin_lock_irq(&card->lock);
r->generation = card->generation;
@ -196,8 +190,6 @@ int fw_iso_resources_update(struct fw_iso_resources *r)
"isochronous resource allocation failed\n");
}
mutex_unlock(&r->mutex);
return channel;
}
EXPORT_SYMBOL(fw_iso_resources_update);
@ -218,7 +210,7 @@ void fw_iso_resources_free(struct fw_iso_resources *r)
return;
card = fw_parent_device(r->unit)->card;
mutex_lock(&r->mutex);
guard(mutex)(&r->mutex);
if (r->allocated) {
bandwidth = r->bandwidth + r->bandwidth_overhead;
@ -230,7 +222,5 @@ void fw_iso_resources_free(struct fw_iso_resources *r)
r->allocated = false;
}
mutex_unlock(&r->mutex);
}
EXPORT_SYMBOL(fw_iso_resources_free);