[PATCH] OMAP: Should cs be positive in gpmc_cs_free()?

Roel Kluin
2009-11-01T13:07:11Z

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>
---
Found by code analysis, is it required?

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 1587682..c892a54 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);