From: Ming Lei <tom.leiming@gmail.com>
Date: Mon, 5 Sep 2011 13:05:56 +0000 (+0800)
Subject: usb: ehci: only prepare zero packet for out transfer if required
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9a971dda8208e0982094f29ef34bd190f2a081bd;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

usb: ehci: only prepare zero packet for out transfer if required

Obviously, ZLP is only required for transfer of OUT direction,
so just take same policy with UHCI for ZLP packet.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 726bd9d74ebb..ef5925830bf1 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -722,7 +722,8 @@ qh_urb_transaction (
 
 	/*
 	 * control requests may need a terminating data "status" ack;
-	 * bulk ones may need a terminating short packet (zero length).
+	 * other OUT ones may need a terminating short packet
+	 * (zero length).
 	 */
 	if (likely (urb->transfer_buffer_length != 0)) {
 		int	one_more = 0;
@@ -731,7 +732,7 @@ qh_urb_transaction (
 			one_more = 1;
 			token ^= 0x0100;	/* "in" <--> "out"  */
 			token |= QTD_TOGGLE;	/* force DATA1 */
-		} else if (usb_pipebulk (urb->pipe)
+		} else if (usb_pipeout(urb->pipe)
 				&& (urb->transfer_flags & URB_ZERO_PACKET)
 				&& !(urb->transfer_buffer_length % maxpacket)) {
 			one_more = 1;