When CONFIG_CAN_CALC_BITTIMING is disabled, the can_calc_bittiming()
functions can not be used and the user needs to provide all the
bittiming parameters.

Currently, can_calc_bittiming() prints an error message to the kernel
log. Instead use NL_SET_ERR_MSG() to make it return the error message
through the netlink interface so that the user can directly see it.

Signed-off-by: Vincent Mailhol <mailhol@kernel.org>
---
Changelog:

  v1 -> v2:

    - New patch.
---
 include/linux/can/bittiming.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/can/bittiming.h b/include/linux/can/bittiming.h
index d30816dd93c7..3926c78b2222 100644
--- a/include/linux/can/bittiming.h
+++ b/include/linux/can/bittiming.h
@@ -141,7 +141,7 @@ static inline int
 can_calc_bittiming(const struct net_device *dev, struct can_bittiming *bt,
 		   const struct can_bittiming_const *btc, struct netlink_ext_ack *extack)
 {
-	netdev_err(dev, "bit-timing calculation not available\n");
+	NL_SET_ERR_MSG(extack, "bit-timing calculation not available\n");
 	return -EINVAL;
 }
 

-- 
2.51.0