[PATCH 3.16 249/366] qlogic: check kstrtoul() for errors

[Ben Hutchings]

3.16.61-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

commit 5fc853cc01c68f84984ecc2d5fd777ecad78240f upstream.

We accidentally left out the error handling for kstrtoul().

Fixes: a520030e326a ("qlcnic: Implement flash sysfs callback for 83xx adapter")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/qlogic/qlcnic/qlcnic_sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sysfs.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sysfs.c
@@ -1122,6 +1122,8 @@ static ssize_t qlcnic_83xx_sysfs_flash_w
 		return QL_STATUS_INVALID_PARAM;
 
 	ret = kstrtoul(buf, 16, &data);
+	if (ret)
+		return ret;
 
 	switch (data) {
 	case QLC_83XX_FLASH_SECTOR_ERASE_CMD: