[PATCH] mtd: nand: omap_gpmc: Fix wrong length check for real

[Sascha Hauer]

Check for length > 0 because otherwise len may become smaller than
0 in which case the loop never ends.

Reported-by: Alexander Shiyan <eagle.alexander923 at gmail.com>
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 drivers/mtd/nand/nand_omap_gpmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/nand_omap_gpmc.c b/drivers/mtd/nand/nand_omap_gpmc.c
index db1ca88791..0f3ffa1c0e 100644
--- a/drivers/mtd/nand/nand_omap_gpmc.c
+++ b/drivers/mtd/nand/nand_omap_gpmc.c
@@ -636,7 +636,7 @@ static void omap_write_buf_pref(struct nand_chip *nand_chip,
 	gpmc_prefetch_enable(info->gpmc_cs,
 			PREFETCH_FIFOTHRESHOLD_MAX, 0x0, len, 0x1);
 
-	while (len) {
+	while (len > 0) {
 		w_count = readl(info->gpmc_base + GPMC_PREFETCH_STATUS);
 		w_count = GPMC_PREFETCH_STATUS_FIFO_CNT(w_count);
 		w_count = w_count >> 2;
-- 
2.20.1