Section 4.4.7.2 of the USB3.0 spec says: A zero-length data payload is a valid transfer and may be useful for some implementations. So, extend the logic of allowing URB_ZERO_PACKET to interrupt urbs too. Otherwise, the kernel throws error of BOGUS transfer flags. Signed-off-by: Amit Virdi <amit.virdi@xxxxxx> --- drivers/usb/core/urb.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c index 991386c..a136246 100644 --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -460,6 +460,10 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) case USB_ENDPOINT_XFER_CONTROL: allowed |= URB_NO_FSBR; /* only affects UHCI */ /* FALLTHROUGH */ + case USB_ENDPOINT_XFER_INT: + if (is_out) + allowed |= URB_ZERO_PACKET; + /* FALLTHROUGH */ default: /* all non-iso endpoints */ if (!is_out) allowed |= URB_SHORT_NOT_OK; -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
