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Wed, 27 Aug 2025 09:20:24 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id IHdCIdjNrmiFEgAAD6G6ig (envelope-from ); Wed, 27 Aug 2025 09:20:24 +0000 From: Takashi Iwai To: linux-sound@vger.kernel.org Cc: Takashi Sakamoto , Clemens Ladisch Subject: [PATCH 06/19] ALSA: firewire: oxfw: Use guard() for mutex locks Date: Wed, 27 Aug 2025 11:20:00 +0200 Message-ID: <20250827092017.29014-7-tiwai@suse.de> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250827092017.29014-1-tiwai@suse.de> References: <20250827092017.29014-1-tiwai@suse.de> Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; 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Only code refactoring, and no behavior change. Signed-off-by: Takashi Iwai --- sound/firewire/oxfw/oxfw-midi.c | 52 ++++++++----------- sound/firewire/oxfw/oxfw-pcm.c | 89 ++++++++++++++------------------- sound/firewire/oxfw/oxfw.c | 3 +- 3 files changed, 60 insertions(+), 84 deletions(-) diff --git a/sound/firewire/oxfw/oxfw-midi.c b/sound/firewire/oxfw/oxfw-midi.c index c215fa6f7a03..7f757f02a877 100644 --- a/sound/firewire/oxfw/oxfw-midi.c +++ b/sound/firewire/oxfw/oxfw-midi.c @@ -16,18 +16,16 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream) if (err < 0) return err; - mutex_lock(&oxfw->mutex); - - err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream, 0, 0, 0, 0); - if (err >= 0) { - ++oxfw->substreams_count; - err = snd_oxfw_stream_start_duplex(oxfw); - if (err < 0) - --oxfw->substreams_count; + scoped_guard(mutex, &oxfw->mutex) { + err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream, 0, 0, 0, 0); + if (err >= 0) { + ++oxfw->substreams_count; + err = snd_oxfw_stream_start_duplex(oxfw); + if (err < 0) + --oxfw->substreams_count; + } } - mutex_unlock(&oxfw->mutex); - if (err < 0) snd_oxfw_stream_lock_release(oxfw); @@ -43,16 +41,14 @@ static int midi_playback_open(struct snd_rawmidi_substream *substream) if (err < 0) return err; - mutex_lock(&oxfw->mutex); - - err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream, 0, 0, 0, 0); - if (err >= 0) { - ++oxfw->substreams_count; - err = snd_oxfw_stream_start_duplex(oxfw); + scoped_guard(mutex, &oxfw->mutex) { + err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream, 0, 0, 0, 0); + if (err >= 0) { + ++oxfw->substreams_count; + err = snd_oxfw_stream_start_duplex(oxfw); + } } - mutex_unlock(&oxfw->mutex); - if (err < 0) snd_oxfw_stream_lock_release(oxfw); @@ -63,12 +59,10 @@ static int midi_capture_close(struct snd_rawmidi_substream *substream) { struct snd_oxfw *oxfw = substream->rmidi->private_data; - mutex_lock(&oxfw->mutex); - - --oxfw->substreams_count; - snd_oxfw_stream_stop_duplex(oxfw); - - mutex_unlock(&oxfw->mutex); + scoped_guard(mutex, &oxfw->mutex) { + --oxfw->substreams_count; + snd_oxfw_stream_stop_duplex(oxfw); + } snd_oxfw_stream_lock_release(oxfw); return 0; @@ -78,12 +72,10 @@ static int midi_playback_close(struct snd_rawmidi_substream *substream) { struct snd_oxfw *oxfw = substream->rmidi->private_data; - mutex_lock(&oxfw->mutex); - - --oxfw->substreams_count; - snd_oxfw_stream_stop_duplex(oxfw); - - mutex_unlock(&oxfw->mutex); + scoped_guard(mutex, &oxfw->mutex) { + --oxfw->substreams_count; + snd_oxfw_stream_stop_duplex(oxfw); + } snd_oxfw_stream_lock_release(oxfw); return 0; diff --git a/sound/firewire/oxfw/oxfw-pcm.c b/sound/firewire/oxfw/oxfw-pcm.c index e13dc817fc28..7fd1984fac78 100644 --- a/sound/firewire/oxfw/oxfw-pcm.c +++ b/sound/firewire/oxfw/oxfw-pcm.c @@ -181,42 +181,35 @@ static int pcm_open(struct snd_pcm_substream *substream) if (err < 0) goto err_locked; - mutex_lock(&oxfw->mutex); + scoped_guard(mutex, &oxfw->mutex) { - // When source of clock is not internal or any stream is reserved for - // transmission of PCM frames, the available sampling rate is limited - // at current one. - if (oxfw->substreams_count > 0 && d->events_per_period > 0) { - unsigned int frames_per_period = d->events_per_period; - unsigned int frames_per_buffer = d->events_per_buffer; + // When source of clock is not internal or any stream is reserved for + // transmission of PCM frames, the available sampling rate is limited + // at current one. + if (oxfw->substreams_count > 0 && d->events_per_period > 0) { + unsigned int frames_per_period = d->events_per_period; + unsigned int frames_per_buffer = d->events_per_buffer; - err = limit_to_current_params(substream); - if (err < 0) { - mutex_unlock(&oxfw->mutex); - goto err_locked; - } - - if (frames_per_period > 0) { - err = snd_pcm_hw_constraint_minmax(substream->runtime, - SNDRV_PCM_HW_PARAM_PERIOD_SIZE, - frames_per_period, frames_per_period); - if (err < 0) { - mutex_unlock(&oxfw->mutex); + err = limit_to_current_params(substream); + if (err < 0) goto err_locked; - } - err = snd_pcm_hw_constraint_minmax(substream->runtime, - SNDRV_PCM_HW_PARAM_BUFFER_SIZE, - frames_per_buffer, frames_per_buffer); - if (err < 0) { - mutex_unlock(&oxfw->mutex); - goto err_locked; + if (frames_per_period > 0) { + err = snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_PERIOD_SIZE, + frames_per_period, frames_per_period); + if (err < 0) + goto err_locked; + + err = snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_BUFFER_SIZE, + frames_per_buffer, frames_per_buffer); + if (err < 0) + goto err_locked; } } } - mutex_unlock(&oxfw->mutex); - snd_pcm_set_sync(substream); return 0; @@ -245,13 +238,12 @@ static int pcm_capture_hw_params(struct snd_pcm_substream *substream, unsigned int frames_per_period = params_period_size(hw_params); unsigned int frames_per_buffer = params_buffer_size(hw_params); - mutex_lock(&oxfw->mutex); + guard(mutex)(&oxfw->mutex); err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream, rate, channels, frames_per_period, frames_per_buffer); if (err >= 0) ++oxfw->substreams_count; - mutex_unlock(&oxfw->mutex); } return err; @@ -268,13 +260,12 @@ static int pcm_playback_hw_params(struct snd_pcm_substream *substream, unsigned int frames_per_period = params_period_size(hw_params); unsigned int frames_per_buffer = params_buffer_size(hw_params); - mutex_lock(&oxfw->mutex); + guard(mutex)(&oxfw->mutex); err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream, rate, channels, frames_per_period, frames_per_buffer); if (err >= 0) ++oxfw->substreams_count; - mutex_unlock(&oxfw->mutex); } return err; @@ -284,30 +275,26 @@ static int pcm_capture_hw_free(struct snd_pcm_substream *substream) { struct snd_oxfw *oxfw = substream->private_data; - mutex_lock(&oxfw->mutex); + guard(mutex)(&oxfw->mutex); if (substream->runtime->state != SNDRV_PCM_STATE_OPEN) --oxfw->substreams_count; snd_oxfw_stream_stop_duplex(oxfw); - mutex_unlock(&oxfw->mutex); - return 0; } static int pcm_playback_hw_free(struct snd_pcm_substream *substream) { struct snd_oxfw *oxfw = substream->private_data; - mutex_lock(&oxfw->mutex); + guard(mutex)(&oxfw->mutex); if (substream->runtime->state != SNDRV_PCM_STATE_OPEN) --oxfw->substreams_count; snd_oxfw_stream_stop_duplex(oxfw); - mutex_unlock(&oxfw->mutex); - return 0; } @@ -316,30 +303,28 @@ static int pcm_capture_prepare(struct snd_pcm_substream *substream) struct snd_oxfw *oxfw = substream->private_data; int err; - mutex_lock(&oxfw->mutex); - err = snd_oxfw_stream_start_duplex(oxfw); - mutex_unlock(&oxfw->mutex); - if (err < 0) - goto end; + scoped_guard(mutex, &oxfw->mutex) { + err = snd_oxfw_stream_start_duplex(oxfw); + if (err < 0) + return err; + } amdtp_stream_pcm_prepare(&oxfw->tx_stream); -end: - return err; + return 0; } static int pcm_playback_prepare(struct snd_pcm_substream *substream) { struct snd_oxfw *oxfw = substream->private_data; int err; - mutex_lock(&oxfw->mutex); - err = snd_oxfw_stream_start_duplex(oxfw); - mutex_unlock(&oxfw->mutex); - if (err < 0) - goto end; + scoped_guard(mutex, &oxfw->mutex) { + err = snd_oxfw_stream_start_duplex(oxfw); + if (err < 0) + return err; + } amdtp_stream_pcm_prepare(&oxfw->rx_stream); -end: - return err; + return 0; } static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) diff --git a/sound/firewire/oxfw/oxfw.c b/sound/firewire/oxfw/oxfw.c index 7a985f3cb8f6..5039bd79b18e 100644 --- a/sound/firewire/oxfw/oxfw.c +++ b/sound/firewire/oxfw/oxfw.c @@ -283,9 +283,8 @@ static void oxfw_bus_reset(struct fw_unit *unit) fcp_bus_reset(oxfw->unit); if (oxfw->has_output || oxfw->has_input) { - mutex_lock(&oxfw->mutex); + guard(mutex)(&oxfw->mutex); snd_oxfw_stream_update_duplex(oxfw); - mutex_unlock(&oxfw->mutex); } if (oxfw->quirks & SND_OXFW_QUIRK_SCS_TRANSACTION) -- 2.50.1