From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 5 May 2017 08:33:56 +0300
Subject: mtd: spi-nor: Potential oops on error path in quad_enable()
Git-commit: 05d090f00203bdcf722b9cb6d5ac57c165e2c95c
Patch-mainline: v4.13-rc1
References: fate#326572
Before commit cff959958832 ("mtd: spi-nor: introduce SPI 1-2-2 and SPI
1-4-4 protocols") then we treated 1 as -EINVAL in the caller but after
that commit we changed to propagate the return. My static checker
complains that it's eventually passed to an ERR_PTR() and later
dereferenced, but I'm not totally certain if that's true. Regardless,
returning 1 is wrong.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
drivers/mtd/spi-nor/spi-nor.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 060a59e716be..eef55b597ec7 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1389,8 +1389,9 @@ static int macronix_quad_enable(struct spi_nor *nor)
write_sr(nor, val | SR_QUAD_EN_MX);
- if (spi_nor_wait_till_ready(nor))
- return 1;
+ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ return ret;
ret = read_sr(nor);
if (!(ret > 0 && (ret & SR_QUAD_EN_MX))) {
--
2.11.0