[PATCH v2 2/8] media: stm32: csi: add missing pm_runtime_put on error

[Alain Volmat]

Within the stm32_csi_start function, pm_runtime_put should
be called upon error following pm_runtime_get_sync.
Rework the function error handling by putting a label in
order to have common error handling for all calls requiring
pm_runtime_put.

Signed-off-by: Alain Volmat <alain.volmat@xxxxxxxxxxx>
---
 drivers/media/platform/st/stm32/stm32-csi.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index 48941aae8c9b..e2f63bb47d33 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -497,21 +497,19 @@ static int stm32_csi_start(struct stm32_csi_dev *csidev,
 
 	ret = pm_runtime_get_sync(csidev->dev);
 	if (ret < 0)
-		return ret;
+		goto error_put;
 
 	/* Retrieve CSI2PHY clock rate to compute CCFR value */
 	phy_clk_frate = clk_get_rate(csidev->clks[STM32_CSI_CLK_CSI2PHY].clk);
 	if (!phy_clk_frate) {
-		pm_runtime_put(csidev->dev);
 		dev_err(csidev->dev, "CSI2PHY clock rate invalid (0)\n");
-		return ret;
+		ret = -EINVAL;
+		goto error_put;
 	}
 
 	ret = stm32_csi_setup_lane_merger(csidev);
-	if (ret) {
-		pm_runtime_put(csidev->dev);
-		return ret;
-	}
+	if (ret)
+		goto error_put;
 
 	/* Enable the CSI */
 	writel_relaxed(STM32_CSI_CR_CSIEN, csidev->base + STM32_CSI_CR);
@@ -567,6 +565,10 @@ static int stm32_csi_start(struct stm32_csi_dev *csidev,
 	writel_relaxed(0, csidev->base + STM32_CSI_PMCR);
 
 	return ret;
+
+error_put:
+	pm_runtime_put(csidev->dev);
+	return ret;
 }
 
 static void stm32_csi_stop(struct stm32_csi_dev *csidev)

-- 
2.34.1