[PATCH 02/10] i2c: designware-platdrv: Gate clk in error path in ->probe()

[Ulf Hansson]

The call to i2c_dw_probe() may fail in ->probe() in which case the clock
remains ungated. Fix the error path by gating the clock before the error
code is returned.

Signed-off-by: Ulf Hansson <ulf.hansson at linaro.org>
---
 drivers/i2c/busses/i2c-designware-platdrv.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index e39962b..19174e7 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -235,6 +235,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
 	ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev));
 	adap->dev.of_node = pdev->dev.of_node;
 
+	pm_runtime_get_noresume(&pdev->dev);
 	if (dev->pm_runtime_disabled) {
 		pm_runtime_forbid(&pdev->dev);
 	} else {
@@ -245,8 +246,13 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
 	}
 
 	r = i2c_dw_probe(dev);
-	if (r && !dev->pm_runtime_disabled)
-		pm_runtime_disable(&pdev->dev);
+	if (r) {
+		if (!IS_ERR(dev->clk))
+			clk_disable_unprepare(dev->clk);
+		if (!dev->pm_runtime_disabled)
+			pm_runtime_disable(&pdev->dev);
+	}
+	pm_runtime_put(&pdev->dev);
 
 	return r;
 }
-- 
1.9.1