linux-kernel - [PATCH 1/2] Input: tegra-kbc: Handle return value of clk_prepare

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Message-Id: <e18b64df1c144ac6ac05bd16e0d5d0cd59a20d13.1501581502.git.arvind.yadav.cs@gmail.com>
Date:   Tue,  1 Aug 2017 15:32:26 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     riyer@...dia.com, ldewangan@...dia.com, dmitry.torokhov@...il.com,
        thierry.reding@...il.com, jonathanh@...dia.com
Cc:     linux-input@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] Input: tegra-kbc: 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/input/keyboard/tegra-kbc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index 0c07e10..edc1385 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -370,8 +370,11 @@ static int tegra_kbc_start(struct tegra_kbc *kbc)
 {
 	unsigned int debounce_cnt;
 	u32 val = 0;
+	int ret;
 
-	clk_prepare_enable(kbc->clk);
+	ret = clk_prepare_enable(kbc->clk);
+	if (ret)
+		return ret;
 
 	/* Reset the KBC controller to clear all previous status.*/
 	reset_control_assert(kbc->rst);
-- 
1.9.1