From: Amit Virdi <amit.virdi@st.com>
Date: Mon, 21 Jul 2014 05:16:18 +0000 (+0530)
Subject: usb: core: allow zero packet flag for interrupt urbs
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~164^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9672f0feb566423deb245032a1c9a7a14dacb6eb;p=pandora-kernel.git

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>
---

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