From: Martin Kelly Date: Tue, 5 Dec 2017 18:34:03 +0000 (-0800) Subject: can: mcba_usb: cancel urb on -EPROTO X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b96f17231dca5ddc2136999ca147cdeb842b2664;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git can: mcba_usb: cancel urb on -EPROTO 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 Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/net/can/usb/mcba_usb.c b/drivers/net/can/usb/mcba_usb.c index a884d31fe324..e0c24abce16c 100644 --- 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(struct urb *urb) case -ENOENT: case -EPIPE: + case -EPROTO: case -ESHUTDOWN: return;