linux-kernel - [PATCH] powerpc: 512x: Fix mpc5121_clk

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Date:	Mon, 26 Mar 2012 21:01:29 +0200
From:	Richard Weinberger <richard@....at>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	linux-kernel@...r.kernel.org, paulus@...ba.org,
	benh@...nel.crashing.org, agust@...x.de,
	Richard Weinberger <richard@....at>
Subject: [PATCH] powerpc: 512x: Fix mpc5121_clk_get()

If try_module_get() fails, mpc5121_clk_get() might return
a wrong clock.

Signed-off-by: Richard Weinberger <richard@....at>
---
 arch/powerpc/platforms/512x/clock.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/512x/clock.c b/arch/powerpc/platforms/512x/clock.c
index 1d8700f..9f771e0 100644
--- a/arch/powerpc/platforms/512x/clock.c
+++ b/arch/powerpc/platforms/512x/clock.c
@@ -54,14 +54,16 @@ static DEFINE_MUTEX(clocks_mutex);
 static struct clk *mpc5121_clk_get(struct device *dev, const char *id)
 {
 	struct clk *p, *clk = ERR_PTR(-ENOENT);
-	int dev_match = 0;
-	int id_match = 0;
+	int dev_match;
+	int id_match;
 
 	if (dev == NULL || id == NULL)
 		return clk;
 
 	mutex_lock(&clocks_mutex);
 	list_for_each_entry(p, &clocks, node) {
+		dev_match = id_match = 0;
+
 		if (dev == p->dev)
 			dev_match++;
 		if (strcmp(id, p->name) == 0)
-- 
1.7.7.3

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