[PATCH 2/2] thermal: intel: powerclamp: Simplify max_idle_set()

[Thorsten Blum <blum@kernel.org>]

Use guard(mutex) and return errors directly to simplify the code.

Signed-off-by: Thorsten Blum <blum@kernel.org>
---
 drivers/thermal/intel/intel_powerclamp.c | 29 ++++++++----------------
 1 file changed, 10 insertions(+), 19 deletions(-)

diff --git a/drivers/thermal/intel/intel_powerclamp.c b/drivers/thermal/intel/intel_powerclamp.c
index 8ceb1270646c..6ca6a082b222 100644
--- a/drivers/thermal/intel/intel_powerclamp.c
+++ b/drivers/thermal/intel/intel_powerclamp.c
@@ -210,41 +210,32 @@ MODULE_PARM_DESC(cpumask, "Mask of CPUs to use for idle injection.");
 static int max_idle_set(const char *arg, const struct kernel_param *kp)
 {
 	u8 new_max_idle;
-	int ret = 0;
+	int ret;
 
-	mutex_lock(&powerclamp_lock);
+	guard(mutex)(&powerclamp_lock);
 
 	/* Can't set mask when cooling device is in use */
-	if (powerclamp_data.clamping) {
-		ret = -EAGAIN;
-		goto skip_limit_set;
-	}
+	if (powerclamp_data.clamping)
+		return -EAGAIN;
 
 	ret = kstrtou8(arg, 10, &new_max_idle);
 	if (ret)
-		goto skip_limit_set;
+		return ret;
 
-	if (new_max_idle > MAX_TARGET_RATIO) {
-		ret = -EINVAL;
-		goto skip_limit_set;
-	}
+	if (new_max_idle > MAX_TARGET_RATIO)
+		return -EINVAL;
 
 	if (!cpumask_available(idle_injection_cpu_mask)) {
 		ret = allocate_copy_idle_injection_mask(cpu_present_mask);
 		if (ret)
-			goto skip_limit_set;
+			return ret;
 	}
 
-	if (check_invalid(idle_injection_cpu_mask, new_max_idle)) {
-		ret = -EINVAL;
-		goto skip_limit_set;
-	}
+	if (check_invalid(idle_injection_cpu_mask, new_max_idle))
+		return -EINVAL;
 
 	max_idle = new_max_idle;
 
-skip_limit_set:
-	mutex_unlock(&powerclamp_lock);
-
 	return ret;
 }