mtd: fix callback return value check

Drivers may (and do) return negative errno values other than -1 from the
ecc.correct callback.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index d551ddd9537..0fd22cce0ec 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1223,7 +1223,7 @@ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, uint3
                 int stat;
 
                 stat = chip->ecc.correct(mtd, p, &chip->buffers->ecccode[i], &chip->buffers->ecccalc[i]);
-                if (stat == -1)
+                if (stat < 0)
                         mtd->ecc_stats.failed++;
                 else
                         mtd->ecc_stats.corrected += stat;