[MTD] [NAND] Fix an off-by-one in a BUG_ON in CAFÉ ECC correction.

err_pos_lut[4096] of an array with 4096 elements is a bug.

Spotted by the Coverity checker.

While I was at it, I also converted it to ARRAY_SIZE().

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/drivers/mtd/nand/cafe_ecc.c b/drivers/mtd/nand/cafe_ecc.c
index 1b9fa05..ea5c849 100644 (file)
--- a/drivers/mtd/nand/cafe_ecc.c
+++ b/drivers/mtd/nand/cafe_ecc.c
@@ -1045,7 +1045,7 @@ static unsigned short err_pos_lut[4096] = {
 
 static unsigned short err_pos(unsigned short din)
 {
-       BUG_ON(din > 4096);
+       BUG_ON(din >= ARRAY_SIZE(err_pos_lut));
        return err_pos_lut[din];
 }
 static int chk_no_err_only(unsigned short *chk_syndrome_list, unsigned short *err_info)