linux-kernel - [PATCH] [RESENDING] dell-laptop - using buffer without mutex

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Message-ID: <1310323613.2923.7.camel@laptop>
Date:	Sun, 10 Jul 2011 15:46:51 -0300
From:	Jose Alonso <joalonsof@...il.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Greg Dietsche <greg@...gd.org>, linux-kernel@...r.kernel.org
Subject: [PATCH] [RESENDING] dell-laptop - using buffer without mutex_lock

(resending patch with tabs and signed-off-by)

Using buffer->output[1] without mutex_lock()

Signed-off-by: Jose Alonso <joalonsof@...il.com>
version linux-3.0-rc6
--
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -560,11 +560,11 @@
 	else
 		dell_send_request(buffer, 0, 1);
 
+	ret = buffer->output[1];
+
 out:
 	release_buffer();
-	if (ret)
-		return ret;
-	return buffer->output[1];
+	return ret;
 }
 
 static const struct backlight_ops dell_ops = {


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