If the user space has supplied an invalid SJW value (greater than the
maximum SJW value), report -EINVAL instead of -ERANGE, this better
matches the actual meaning of the error value.
Additionally report an error message via netlink to the user space.
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
drivers/net/can/dev/bittiming.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/can/dev/bittiming.c b/drivers/net/can/dev/bittiming.c
index 727dcd52cc2c..0a2a9b12565f 100644
--- a/drivers/net/can/dev/bittiming.c
+++ b/drivers/net/can/dev/bittiming.c
@@ -18,8 +18,11 @@ void can_sjw_set_default(struct can_bittiming *bt)
int can_sjw_check(const struct net_device *dev, const struct can_bittiming *bt,
const struct can_bittiming_const *btc, struct netlink_ext_ack *extack)
{
- if (bt->sjw > btc->sjw_max)
- return -ERANGE;
+ if (bt->sjw > btc->sjw_max) {
+ NL_SET_ERR_MSG_FMT(extack, "sjw: %u greater than max sjw: %u",
+ bt->sjw, btc->sjw_max);
+ return -EINVAL;
+ }
return 0;
}
--
2.39.1
