During testing I noticed a crash if unloading/loading the gs_usb driver during high CAN bus load.
The current version of the candlelight firmware doesn't flush the queues of the received CAN frames during the reset command. This leads to a crash if hardware timestamps are enabled, it a URB from the device is received before the cycle counter/time counter infrastructure has been setup.
First clean up then error handling in gs_can_open().
Then, fix the problem by converting the cycle counter/time counter infrastructure from a per-channel to per-device and set it up before submitting RX-URBs to the USB stack.
Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de --- Marc Kleine-Budde (2): can: gs_usb: gs_can_open(): improve error handling can: gs_usb: fix time stamp counter initialization
drivers/net/can/usb/gs_usb.c | 130 ++++++++++++++++++++++++------------------- 1 file changed, 74 insertions(+), 56 deletions(-) --- base-commit: 0dd1805fe498e0cf64f68e451a8baff7e64494ec change-id: 20230712-gs_usb-fix-time-stamp-counter-4bd302c808af
Best regards,