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 f865756..f3c992e 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -378,7 +378,7 @@
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);