4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jimmy Assarsson <jimmyassarsson@xxxxxxxxx>
commit e84f44eb5523401faeb9cc1c97895b68e3cfb78d upstream.
The conditon in the while-loop becomes true when actual_length is less than
2 (MSG_HEADER_LEN). In best case we end up with a former, already
dispatched msg, that got msg->len greater than actual_length. This will
result in a "Format error" error printout.
Problem seen when unplugging a Kvaser USB device connected to a vbox guest.
warning: comparison between signed and unsigned integer expressions
[-Wsign-compare]
Signed-off-by: Jimmy Assarsson <jimmyassarsson@xxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/can/usb/kvaser_usb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/can/usb/kvaser_usb.c
+++ b/drivers/net/can/usb/kvaser_usb.c
@@ -1330,7 +1330,7 @@ static void kvaser_usb_read_bulk_callbac
goto resubmit_urb;
}
- while (pos <= urb->actual_length - MSG_HEADER_LEN) {
+ while (pos <= (int)(urb->actual_length - MSG_HEADER_LEN)) {
msg = urb->transfer_buffer + pos;
/* The Kvaser firmware can only read and write messages that