[PATCH 2/3] ALSA: hda/cs35l56: Use scoped_guard() for irq_lock in cs35l56_hda_fw_load()

[wangdich9700@163.com]

From: wangdicheng <wangdicheng@kylinos.cn>

Replace the manual mutex_lock/mutex_unlock of irq_lock with
scoped_guard(). This lets the compiler guarantee the lock is
released on all exit paths, eliminating the err label that
previously existed only to reach the unlock call.

No functional changes.

Signed-off-by: wangdicheng <wangdicheng@kylinos.cn>
---
 sound/hda/codecs/side-codecs/cs35l56_hda.c | 104 ++++++++++-----------
 1 file changed, 51 insertions(+), 53 deletions(-)

diff --git a/sound/hda/codecs/side-codecs/cs35l56_hda.c b/sound/hda/codecs/side-codecs/cs35l56_hda.c
index a0ea08eb96a9..2d9d75053293 100644
--- a/sound/hda/codecs/side-codecs/cs35l56_hda.c
+++ b/sound/hda/codecs/side-codecs/cs35l56_hda.c
@@ -625,74 +625,72 @@ static void cs35l56_hda_fw_load(struct cs35l56_hda *cs35l56)
 		goto err_fw_release;
 	}
 
-	mutex_lock(&cs35l56->base.irq_lock);
+	scoped_guard(mutex, &cs35l56->base.irq_lock) {
+		/*
+		 * If the firmware hasn't been patched it must be shutdown before
+		 * doing a full patch and reset afterwards. If it is already
+		 * running a patched version the firmware files only contain
+		 * tunings and we can use the lower cost reinit sequence instead.
+		 */
+		if (firmware_missing && (wmfw_firmware || coeff_firmware)) {
+			ret = cs35l56_firmware_shutdown(&cs35l56->base);
+			if (ret)
+				goto err_fw_release;
+		}
 
-	/*
-	 * If the firmware hasn't been patched it must be shutdown before
-	 * doing a full patch and reset afterwards. If it is already
-	 * running a patched version the firmware files only contain
-	 * tunings and we can use the lower cost reinit sequence instead.
-	 */
-	if (firmware_missing && (wmfw_firmware || coeff_firmware)) {
-		ret = cs35l56_firmware_shutdown(&cs35l56->base);
-		if (ret)
-			goto err;
-	}
+		ret = cs_dsp_power_up(&cs35l56->cs_dsp, wmfw_firmware, wmfw_filename,
+				      coeff_firmware, coeff_filename, "misc");
+		if (ret) {
+			dev_dbg(cs35l56->base.dev, "%s: cs_dsp_power_up ret %d\n", __func__, ret);
+			goto err_fw_release;
+		}
 
-	ret = cs_dsp_power_up(&cs35l56->cs_dsp, wmfw_firmware, wmfw_filename,
-			      coeff_firmware, coeff_filename, "misc");
-	if (ret) {
-		dev_dbg(cs35l56->base.dev, "%s: cs_dsp_power_up ret %d\n", __func__, ret);
-		goto err;
-	}
+		if (wmfw_filename)
+			dev_dbg(cs35l56->base.dev, "Loaded WMFW Firmware: %s\n", wmfw_filename);
+
+		if (coeff_filename)
+			dev_dbg(cs35l56->base.dev, "Loaded Coefficients: %s\n", coeff_filename);
 
-	if (wmfw_filename)
-		dev_dbg(cs35l56->base.dev, "Loaded WMFW Firmware: %s\n", wmfw_filename);
+		/* If we downloaded firmware, reset the device and wait for it to boot */
+		if (firmware_missing && (wmfw_firmware || coeff_firmware)) {
+			cs35l56_system_reset(&cs35l56->base, false);
+			regcache_mark_dirty(cs35l56->base.regmap);
+			ret = cs35l56_wait_for_firmware_boot(&cs35l56->base);
+			if (ret)
+				goto err_powered_up;
 
-	if (coeff_filename)
-		dev_dbg(cs35l56->base.dev, "Loaded Coefficients: %s\n", coeff_filename);
+			regcache_cache_only(cs35l56->base.regmap, false);
+		}
 
-	/* If we downloaded firmware, reset the device and wait for it to boot */
-	if (firmware_missing && (wmfw_firmware || coeff_firmware)) {
-		cs35l56_system_reset(&cs35l56->base, false);
-		regcache_mark_dirty(cs35l56->base.regmap);
-		ret = cs35l56_wait_for_firmware_boot(&cs35l56->base);
+		/* Disable auto-hibernate so that runtime_pm has control */
+		ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_PREVENT_AUTO_HIBERNATE);
 		if (ret)
 			goto err_powered_up;
 
-		regcache_cache_only(cs35l56->base.regmap, false);
-	}
-
-	/* Disable auto-hibernate so that runtime_pm has control */
-	ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_PREVENT_AUTO_HIBERNATE);
-	if (ret)
-		goto err_powered_up;
-
-	regcache_sync(cs35l56->base.regmap);
+		regcache_sync(cs35l56->base.regmap);
 
-	regmap_clear_bits(cs35l56->base.regmap,
-			  cs35l56->base.fw_reg->prot_sts,
-			  CS35L56_FIRMWARE_MISSING);
-	cs35l56->base.fw_patched = true;
+		regmap_clear_bits(cs35l56->base.regmap,
+				  cs35l56->base.fw_reg->prot_sts,
+				  CS35L56_FIRMWARE_MISSING);
+		cs35l56->base.fw_patched = true;
 
-	ret = cs_dsp_run(&cs35l56->cs_dsp);
-	if (ret)
-		dev_dbg(cs35l56->base.dev, "%s: cs_dsp_run ret %d\n", __func__, ret);
+		ret = cs_dsp_run(&cs35l56->cs_dsp);
+		if (ret)
+			dev_dbg(cs35l56->base.dev, "%s: cs_dsp_run ret %d\n", __func__, ret);
 
-	/* Don't need to check return code, it's not fatal if this fails */
-	cs35l56_hda_apply_calibration(cs35l56);
+		/* Don't need to check return code, it's not fatal if this fails */
+		cs35l56_hda_apply_calibration(cs35l56);
 
-	ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_REINIT);
-	if (ret)
-		cs_dsp_stop(&cs35l56->cs_dsp);
+		ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_REINIT);
+		if (ret)
+			cs_dsp_stop(&cs35l56->cs_dsp);
 
-	cs35l56_log_tuning(&cs35l56->base, &cs35l56->cs_dsp);
+		cs35l56_log_tuning(&cs35l56->base, &cs35l56->cs_dsp);
 
 err_powered_up:
-	if (!cs35l56->base.fw_patched)
-		cs_dsp_power_down(&cs35l56->cs_dsp);
-err:
-	mutex_unlock(&cs35l56->base.irq_lock);
+		if (!cs35l56->base.fw_patched)
+			cs_dsp_power_down(&cs35l56->cs_dsp);
+	}
 err_fw_release:
 	cs35l56_hda_release_firmware_files(wmfw_firmware, wmfw_filename,
 					   coeff_firmware, coeff_filename);
-- 
2.25.1