4.14-stable review patch. If anyone has any objections, please let me know.
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From: Martin Kelly mkelly@xevo.com
commit c7f33023308f3142433b7379718af5f0c2c322a6 upstream.
When we unplug the device, we can see both -EPIPE and -EPROTO depending on exact timing and what system we run on. If we continue to resubmit URBs, they will immediately fail, and they can cause stalls, especially on slower CPUs.
Fix this by not resubmitting on -EPROTO, as we already do on -EPIPE.
Signed-off-by: Martin Kelly mkelly@xevo.com Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/can/usb/mcba_usb.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/net/can/usb/mcba_usb.c +++ b/drivers/net/can/usb/mcba_usb.c @@ -593,6 +593,7 @@ static void mcba_usb_read_bulk_callback(
case -ENOENT: case -EPIPE: + case -EPROTO: case -ESHUTDOWN: return;