[PATCH 1/2] platform/x86/amd: pmc: Use guard(mutex)

[Mario Limonciello <superm1@xxxxxxxxxx>]

From: Mario Limonciello <mario.limonciello@xxxxxxx>

Instead of using the `goto label; mutex_unlock()` pattern use
`guard(mutex)` which will release the mutex when it goes out of scope.

Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
 drivers/platform/x86/amd/pmc/pmc.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/platform/x86/amd/pmc/pmc.c b/drivers/platform/x86/amd/pmc/pmc.c
index 26b878ee51918..ef105ca6de24a 100644
--- a/drivers/platform/x86/amd/pmc/pmc.c
+++ b/drivers/platform/x86/amd/pmc/pmc.c
@@ -688,7 +688,7 @@ static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg,
 	int rc;
 	u32 val, message, argument, response;
 
-	mutex_lock(&dev->lock);
+	guard(mutex)(&dev->lock);
 
 	if (dev->msg_port) {
 		message = AMD_S2D_REGISTER_MESSAGE;
@@ -706,7 +706,7 @@ static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg,
 				PMC_MSG_DELAY_MIN_US * RESPONSE_REGISTER_LOOP_MAX);
 	if (rc) {
 		dev_err(dev->dev, "failed to talk to SMU\n");
-		goto out_unlock;
+		return rc;
 	}
 
 	/* Write zero to response register */
@@ -724,7 +724,7 @@ static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg,
 				PMC_MSG_DELAY_MIN_US * RESPONSE_REGISTER_LOOP_MAX);
 	if (rc) {
 		dev_err(dev->dev, "SMU response timed out\n");
-		goto out_unlock;
+		return rc;
 	}
 
 	switch (val) {
@@ -738,21 +738,19 @@ static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg,
 	case AMD_PMC_RESULT_CMD_REJECT_BUSY:
 		dev_err(dev->dev, "SMU not ready. err: 0x%x\n", val);
 		rc = -EBUSY;
-		goto out_unlock;
+		break;
 	case AMD_PMC_RESULT_CMD_UNKNOWN:
 		dev_err(dev->dev, "SMU cmd unknown. err: 0x%x\n", val);
 		rc = -EINVAL;
-		goto out_unlock;
+		break;
 	case AMD_PMC_RESULT_CMD_REJECT_PREREQ:
 	case AMD_PMC_RESULT_FAILED:
 	default:
 		dev_err(dev->dev, "SMU cmd failed. err: 0x%x\n", val);
 		rc = -EIO;
-		goto out_unlock;
+		break;
 	}
 
-out_unlock:
-	mutex_unlock(&dev->lock);
 	amd_pmc_dump_registers(dev);
 	return rc;
 }
-- 
2.43.0