linux-kernel - [PATCH 12/16] drivers/platform/x86: Use available error codes

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Message-ID: <Pine.LNX.4.64.1008161827470.19313@ask.diku.dk>
Date:	Mon, 16 Aug 2010 18:28:03 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	Matthew Garrett <mjg59@...f.ucam.org>,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH 12/16] drivers/platform/x86: Use available error codes

From: Julia Lawall <julia@...u.dk>

An error code is stored in ret, but the return value is always 0.  Return
ret instead.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
local idexpression x;
constant C;
@@

if (...) { ...
  x = -C
  ... when != x
(
  return <+...x...+>;
|
  return NULL;
|
  return;
|
* return ...;
)
}
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
This changes the semantics of the function and has not been tested.

 drivers/platform/x86/dell-laptop.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index b41ed5c..d4d6c9d 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -441,7 +441,7 @@ static int dell_send_intensity(struct backlight_device *bd)
 
 out:
 	release_buffer();
-	return 0;
+	return ret;
 }
 
 static int dell_get_intensity(struct backlight_device *bd)
--
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