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[V2,1/2] Input: at32psif: handle clk_enable return value

Message ID 1441942490-5980-1-git-send-email-pingbo.wen@linaro.org
State New
Headers show

Commit Message

Pingbo Wen Sept. 11, 2015, 3:34 a.m. UTC 
We should print the err if clk_enable failed.

Signed-off-by: WEN Pingbo <pingbo.wen@linaro.org>
---
 drivers/input/serio/at32psif.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/input/serio/at32psif.c b/drivers/input/serio/at32psif.c
index 2e4ff5b..38862a8 100644
--- a/drivers/input/serio/at32psif.c
+++ b/drivers/input/serio/at32psif.c
@@ -185,6 +185,7 @@  static void psif_set_prescaler(struct psif *psif)
 {
 	unsigned long prscv;
 	unsigned long rate = clk_get_rate(psif->pclk);
+	int retval;
 
 	/* PRSCV = Pulse length (100 us) * PSIF module frequency. */
 	prscv = 100 * (rate / 1000000UL);
@@ -195,7 +196,12 @@  static void psif_set_prescaler(struct psif *psif)
 				"prescaler set to max\n");
 	}
 
-	clk_enable(psif->pclk);
+	retval = clk_enable(psif->pclk);
+	if (retval < 0) {
+		dev_err(&psif->pdev->dev,
+			"could not enable pclk, ret %d\n", retval);
+		return;
+	}
 	psif_writel(psif, PSR, prscv);
 	clk_disable(psif->pclk);
 }