tree 8524beac8a2737efb47527ed06e1e43955d13e3d
parent b1bd3f1a398ef27dd09a594c38dde34472b453af
author Amit Virdi <amit.virdi@st.com> 1405919778 +0530
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1406071858 -0700

usb: core: allow zero packet flag for interrupt urbs

Section 4.4.7.2 "Interrupt Transfer Bandwidth Requirements" 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 warning of BOGUS transfer flags.

Signed-off-by: Amit Virdi <amit.virdi@st.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>