can: bittiming: can_validate_bitrate(): report error via netlink

Report an error to user space via netlink if the requested bit rate is
not supported by the device.

Link: https://lore.kernel.org/all/20230202110854.2318594-18-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/dev/bittiming.c b/drivers/net/can/dev/bittiming.c
index 55714e08ca3addac4b880432456b06534c291283..0b93900b1dfa38225694a6f8166e64affeaee106 100644 (file)
--- a/drivers/net/can/dev/bittiming.c
+++ b/drivers/net/can/dev/bittiming.c
@@ -124,6 +124,9 @@ can_validate_bitrate(const struct net_device *dev, const struct can_bittiming *b
                        return 0;
        }
 
+       NL_SET_ERR_MSG_FMT(extack, "bitrate %u bps not supported",
+                          bt->brp);
+
        return -EINVAL;
 }