linux-kernel - [PATCH] PM / clock_ops: initialize ret to avoid garbage being returned

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Date:	Thu,  8 Jan 2015 15:31:01 +0000
From:	Colin King <colin.king@...onical.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	linux-pm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] PM / clock_ops: initialize ret to avoid garbage being returned

From: Colin Ian King <colin.king@...onical.com>

cppcheck detected an unitialised ret:
  [drivers/base/power/clock_ops.c:53]: (error) Uninitialized variable: ret

ret is only assigned if ce->status < PCE_STATUS_ERROR, if this is false
then __pm_clk_enable returns whatever garbage ret picks up from the stack.

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/base/power/clock_ops.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index d626576..5bd283d 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -39,7 +39,7 @@ struct pm_clock_entry {
  */
 static inline int __pm_clk_enable(struct device *dev, struct pm_clock_entry *ce)
 {
-	int ret;
+	int ret = 0;
 
 	if (ce->status < PCE_STATUS_ERROR) {
 		ret = clk_enable(ce->clk);
-- 
1.7.9.5

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