[PATCH 1/3] drm/i915/hwmon: Get mutex and rpm ref just once in hwm_power_max_write

[Ashutosh Dixit]

In preparation for follow-on patches, refactor hwm_power_max_write to take
hwmon_lock and runtime pm wakeref at start of the function and release them
at the end, therefore acquiring these just once each.

Signed-off-by: Ashutosh Dixit <ashutosh.dixit at intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/i915/i915_hwmon.c | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c
index 8e7dccc8d3a0e..7f44e809ca155 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -396,31 +396,33 @@ hwm_power_max_write(struct hwm_drvdata *ddat, long val)
 {
 	struct i915_hwmon *hwmon = ddat->hwmon;
 	intel_wakeref_t wakeref;
+	int ret = 0;
 	u32 nval;
 
+	mutex_lock(&hwmon->hwmon_lock);
+	wakeref = intel_runtime_pm_get(ddat->uncore->rpm);
+
 	/* Disable PL1 limit and verify, because the limit cannot be disabled on all platforms */
 	if (val == PL1_DISABLE) {
-		mutex_lock(&hwmon->hwmon_lock);
-		with_intel_runtime_pm(ddat->uncore->rpm, wakeref) {
-			intel_uncore_rmw(ddat->uncore, hwmon->rg.pkg_rapl_limit,
-					 PKG_PWR_LIM_1_EN, 0);
-			nval = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
-		}
-		mutex_unlock(&hwmon->hwmon_lock);
+		intel_uncore_rmw(ddat->uncore, hwmon->rg.pkg_rapl_limit,
+				 PKG_PWR_LIM_1_EN, 0);
+		nval = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
 
 		if (nval & PKG_PWR_LIM_1_EN)
-			return -ENODEV;
-		return 0;
+			ret = -ENODEV;
+		goto exit;
 	}
 
 	/* Computation in 64-bits to avoid overflow. Round to nearest. */
 	nval = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_power, SF_POWER);
 	nval = PKG_PWR_LIM_1_EN | REG_FIELD_PREP(PKG_PWR_LIM_1, nval);
 
-	hwm_locked_with_pm_intel_uncore_rmw(ddat, hwmon->rg.pkg_rapl_limit,
-					    PKG_PWR_LIM_1_EN | PKG_PWR_LIM_1,
-					    nval);
-	return 0;
+	intel_uncore_rmw(ddat->uncore, hwmon->rg.pkg_rapl_limit,
+			 PKG_PWR_LIM_1_EN | PKG_PWR_LIM_1, nval);
+exit:
+	intel_runtime_pm_put(ddat->uncore->rpm, wakeref);
+	mutex_unlock(&hwmon->hwmon_lock);
+	return ret;
 }
 
 static int
-- 
2.38.0