From: Roel Kluin <roel.kluin@gmail.com>
Date: Tue, 17 Nov 2009 22:39:06 +0000 (-0800)
Subject: OMAP: cs should be positive in gpmc_cs_free()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e7fdc6052e78738ce90e0bdc051f2ddf60e41324;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

OMAP: cs should be positive in gpmc_cs_free()

The index `cs' is signed, test whether it is negative before we release
gpmc_cs_mem[cs].

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index f8657568b1b..f3c992e2965 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -378,7 +378,7 @@ EXPORT_SYMBOL(gpmc_cs_request);
 void gpmc_cs_free(int cs)
 {
 	spin_lock(&gpmc_mem_lock);
-	if (cs >= GPMC_CS_NUM || !gpmc_cs_reserved(cs)) {
+	if (cs >= GPMC_CS_NUM || cs < 0 || !gpmc_cs_reserved(cs)) {
 		printk(KERN_ERR "Trying to free non-reserved GPMC CS%d\n", cs);
 		BUG();
 		spin_unlock(&gpmc_mem_lock);