| From | Ben Hutchings <> | Date | Wed, 28 Feb 2018 15:20:21 +0000 | Subject | [PATCH 3.2 035/140] can: ems_usb: cancel urb on -EPIPE and -EPROTO |
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3.2.100-rc1 review patch. If anyone has any objections, please let me know.
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From: Martin Kelly <mkelly@xevo.com>
commit bd352e1adfe0d02d3ea7c8e3fb19183dc317e679 upstream.
In mcba_usb, we have observed that when you unplug the device, the driver will endlessly resubmit failing URBs, which can cause CPU stalls. This issue is fixed in mcba_usb by catching the codes seen on device disconnect (-EPIPE and -EPROTO).
This driver also resubmits in the case of -EPIPE and -EPROTO, so fix it in the same way.
Signed-off-by: Martin Kelly <mkelly@xevo.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/net/can/usb/ems_usb.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/can/usb/ems_usb.c +++ b/drivers/net/can/usb/ems_usb.c @@ -292,6 +292,8 @@ static void ems_usb_read_interrupt_callb case -ECONNRESET: /* unlink */ case -ENOENT: + case -EPIPE: + case -EPROTO: case -ESHUTDOWN: return;
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