[PATCH] misc: atmel-ssc: Handle return value of clk_prepare_enable and clk_prepare
Arvind Yadav
arvind.yadav.cs at gmail.com
Thu Jun 1 01:52:28 PDT 2017
clk_prepare_enable() and clk_prepare() can fail here and
we must check its return value.
Signed-off-by: Arvind Yadav <arvind.yadav.cs at gmail.com>
---
drivers/misc/atmel-ssc.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
index b2a0340..4d2b090 100644
--- a/drivers/misc/atmel-ssc.c
+++ b/drivers/misc/atmel-ssc.c
@@ -30,6 +30,7 @@ struct ssc_device *ssc_request(unsigned int ssc_num)
{
int ssc_valid = 0;
struct ssc_device *ssc;
+ int ret;
spin_lock(&user_lock);
list_for_each_entry(ssc, &ssc_list, list) {
@@ -60,7 +61,11 @@ struct ssc_device *ssc_request(unsigned int ssc_num)
ssc->user++;
spin_unlock(&user_lock);
- clk_prepare(ssc->clk);
+ ret = clk_prepare(ssc->clk);
+ if (ret) {
+ pr_err("Failed to prepare clock\n");
+ return ret;
+ }
return ssc;
}
@@ -195,6 +200,7 @@ static int ssc_probe(struct platform_device *pdev)
struct resource *regs;
struct ssc_device *ssc;
const struct atmel_ssc_platform_data *plat_dat;
+ int ret;
ssc = devm_kzalloc(&pdev->dev, sizeof(struct ssc_device), GFP_KERNEL);
if (!ssc) {
@@ -229,7 +235,9 @@ static int ssc_probe(struct platform_device *pdev)
}
/* disable all interrupts */
- clk_prepare_enable(ssc->clk);
+ ret = clk_prepare_enable(ssc->clk);
+ if (ret)
+ return ret;
ssc_writel(ssc->regs, IDR, -1);
ssc_readl(ssc->regs, SR);
clk_disable_unprepare(ssc->clk);
--
1.9.1
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