can: gs_usb: gs_usb_xmit_callback(): fix handling of failed transmitted URBs

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[ Upstream commit 516a0cd1c0 ]

The driver lacks the cleanup of failed transfers of URBs. This reduces the
number of available URBs per error by 1. This leads to reduced performance
and ultimately to a complete stop of the transmission.

If the sending of a bulk URB fails do proper cleanup:
- increase netdev stats
- mark the echo_sbk as free
- free the driver's context and do accounting
- wake the send queue

Closes: https://github.com/candle-usb/candleLight_fw/issues/187
Fixes: d08e973a77 ("can: gs_usb: Added support for the GS_USB CAN devices")
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Charles Xu <charles_xu@189.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Marc Kleine-Budde 2026-03-18 13:22:13 +08:00 • committed by Greg Kroah-Hartman

parent 60673f4429

commit 87974ebd65

1 changed files with 15 additions and 2 deletions

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drivers/net/can/usb/gs_usb.c

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