[PATCH] nand: fix .correct callback return value check

[Baruch Siach]

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

Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
 drivers/mtd/nand/nand_base.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 4a7b864..080f551 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1210,7 +1210,7 @@ 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;
-- 
1.7.1