linux-kernel - [PATCH] pcmcia: soc_common: Handle return value of clk_prepare

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Message-Id: <ece6e88386cdfde2b090370279944dd6a41067ef.1496313643.git.arvind.yadav.cs@gmail.com>
Date:   Thu,  1 Jun 2017 16:17:10 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     rmk+kernel@...linux.org.uk
Cc:     linux-pcmcia@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] pcmcia: soc_common: 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@...il.com>
---
 drivers/pcmcia/soc_common.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/pcmcia/soc_common.c b/drivers/pcmcia/soc_common.c
index b6b316d..c8cbf27 100644
--- a/drivers/pcmcia/soc_common.c
+++ b/drivers/pcmcia/soc_common.c
@@ -191,12 +191,16 @@ static int soc_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
 {
 	int ret = 0, i;
 
-	clk_prepare_enable(skt->clk);
+	ret = clk_prepare_enable(skt->clk);
+	if (ret)
+		return ret;
 
 	if (skt->ops->hw_init) {
 		ret = skt->ops->hw_init(skt);
-		if (ret)
+		if (ret) {
+			clk_disable_unprepare(skt->clk);
 			return ret;
+		}
 	}
 
 	for (i = 0; i < ARRAY_SIZE(skt->stat); i++) {
-- 
1.9.1