Thread (1 message) 1 message, 1 author, 2012-07-15

Re: [PATCH] clk: fix error path inside clk_get()

From: Rob Herring <hidden>
Date: 2012-07-15 19:03:12

On 07/15/2012 01:01 PM, John Crispin wrote:
clk_get() calls of_clk_get_by_name() which can return a ERR_PTR. The error path
currently only checks for !NULL. We need to use !IS_ERR_OR_NULL instead.

This bug was introduced by 766e6a4ec602d0c107553b91b3434fe9c03474f4

Signed-off-by: John Crispin <redacted>
Cc: Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
Cc: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org
---
I am seeing this bug on linux-next from 13.07.2012
Already got a fix for this from Shawn Guo earlier today.
quoted hunk
 drivers/clk/clkdev.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index 20649b3..7100d5c 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -157,7 +157,7 @@ struct clk *clk_get(struct device *dev, const char *con_id)
 
 	if (dev) {
 		clk = of_clk_get_by_name(dev->of_node, con_id);
-		if (clk && __clk_get(clk))
+		if (!IS_ERR_OR_NULL(clk) && __clk_get(clk))
IS_ERR() is correct here.

Rob
 			return clk;
 	}
 
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