ctlr->mode is of unsigned type, it is never less than zero.
Fix this by using an extra varibale called 'res', to store return value
from sysfs_match_string() and assign that to ctlr->mode on the success
path.
Fixes: edc22a7c8688 ("scsi: fcoe: Use sysfs_match_string() over fcoe_parse_mode()")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@xxxxxxxxxx>
---
This is based on static analysis with smatch and only compile tested.
---
drivers/scsi/fcoe/fcoe_sysfs.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/fcoe/fcoe_sysfs.c b/drivers/scsi/fcoe/fcoe_sysfs.c
index 408a806bf4c2..c64a085a7ee2 100644
--- a/drivers/scsi/fcoe/fcoe_sysfs.c
+++ b/drivers/scsi/fcoe/fcoe_sysfs.c
@@ -263,6 +263,7 @@ static ssize_t store_ctlr_mode(struct device *dev,
const char *buf, size_t count)
{
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
+ int res;
if (count > FCOE_MAX_MODENAME_LEN)
return -EINVAL;
@@ -279,12 +280,13 @@ static ssize_t store_ctlr_mode(struct device *dev,
return -ENOTSUPP;
}
- ctlr->mode = sysfs_match_string(fip_conn_type_names, buf);
- if (ctlr->mode < 0 || ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
+ res = sysfs_match_string(fip_conn_type_names, buf);
+ if (res < 0 || res == FIP_CONN_TYPE_UNKNOWN) {
LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n",
buf);
return -EINVAL;
}
+ ctlr->mode = res;
ctlr->f->set_fcoe_ctlr_mode(ctlr);
LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf);
--
2.39.3
