From: Arvind Yadav <arvind.yadav.cs@gmail.com>
Date: Mon, 7 Aug 2017 07:45:19 +0000 (+0530)
Subject: dmaengine: at_xdmac: Handle return value of clk_prepare_enable.
X-Git-Tag: v4.14-rc1~108^2~16
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=87c56dcba4573441b5cc4b42ecbb35188fee8f04;p=thirdparty%2Flinux.git

dmaengine: at_xdmac: Handle return value of clk_prepare_enable.

clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---

diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index 6a3cf97093701..c00e3923d7d81 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -1883,8 +1883,11 @@ static int atmel_xdmac_resume(struct device *dev)
 	struct at_xdmac_chan	*atchan;
 	struct dma_chan		*chan, *_chan;
 	int			i;
+	int ret;
 
-	clk_prepare_enable(atxdmac->clk);
+	ret = clk_prepare_enable(atxdmac->clk);
+	if (ret)
+		return ret;
 
 	/* Clear pending interrupts. */
 	for (i = 0; i < atxdmac->dma.chancnt; i++) {