4.9-stable review patch. If anyone has any objections, please let me know.
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From: Wolfgang Grandegger wg@grandegger.com
commit d5b42e6607661b198d8b26a0c30969605b1bf5c7 upstream.
The "set_bittiming" callback treats a positive return value as error! For that reason "can_changelink()" will quit silently after setting the bittiming values without processing ctrlmode, restart-ms, etc.
Signed-off-by: Wolfgang Grandegger wg@grandegger.com Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/can/usb/gs_usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/can/usb/gs_usb.c +++ b/drivers/net/can/usb/gs_usb.c @@ -449,7 +449,7 @@ static int gs_usb_set_bittiming(struct n dev_err(netdev->dev.parent, "Couldn't set bittimings (err=%d)", rc);
- return rc; + return (rc > 0) ? 0 : rc; }
static void gs_usb_xmit_callback(struct urb *urb)