linux-kernel - [patch] vga_switcheroo: comparing too few characters in strncmp()

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Message-ID: <20110107051227.GD1717@bicker>
Date:	Fri, 7 Jan 2011 08:12:27 +0300
From:	Dan Carpenter <error27@...il.com>
To:	Dave Airlie <airlied@...hat.com>
Cc:	Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] vga_switcheroo: comparing too few characters in strncmp()

This is a copy-and-paste bug.  We should be comparing 4 characters here
instead of 3.

Signed-off-by: Dan Carpenter <error27@...il.com>

diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index d2d8543..e01cacb 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -346,11 +346,11 @@ vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
 	if (strncmp(usercmd, "DIS", 3) == 0)
 		client_id = VGA_SWITCHEROO_DIS;
 
-	if (strncmp(usercmd, "MIGD", 3) == 0) {
+	if (strncmp(usercmd, "MIGD", 4) == 0) {
 		just_mux = true;
 		client_id = VGA_SWITCHEROO_IGD;
 	}
-	if (strncmp(usercmd, "MDIS", 3) == 0) {
+	if (strncmp(usercmd, "MDIS", 4) == 0) {
 		just_mux = true;
 		client_id = VGA_SWITCHEROO_DIS;
 	}
--
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