From d6b8e12c485d6c3e7a6b87cf9e2f5df7cba14246 Mon Sep 17 00:00:00 2001
From: Ladi Prosek <lprosek@redhat.com>
Date: Wed, 17 May 2017 08:53:02 +0200
Subject: [PATCH 08/27] xhci: relax link check

RH-Author: Ladi Prosek <lprosek@redhat.com>
Message-id: <20170517085302.26786-2-lprosek@redhat.com>
Patchwork-id: 75234
O-Subject: [RHV-7.4 qemu-kvm-rhev PATCH 1/1] xhci: relax link check
Bugzilla: 1444003
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>

The strict td link limit added by commit "05f43d4 xhci: limit the
number of link trbs we are willing to process" causes problems with
Windows guests. Let's raise the limit.

This change is analogous to:

  commit ab6b1105a2259c7072905887f71caa850ce63190
  Author: Gerd Hoffmann <kraxel@redhat.com>
  Date:   Tue Mar 7 09:40:18 2017 +0100

      ohci: relax link check

Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Message-id: 20170512102100.22675-1-lprosek@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry-picked from commit 99f9aeba5d461f79c9ce73f968ba0feb77fc1f5a)
Signed-off-by: Ladi Prosek <lprosek@redhat.com>

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 hw/usb/hcd-xhci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 1555aa4..da9ed15 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -50,7 +50,7 @@
 /* Very pessimistic, let's hope it's enough for all cases */
 #define EV_QUEUE (((3 * 24) + 16) * MAXSLOTS)
 
-#define TRB_LINK_LIMIT  4
+#define TRB_LINK_LIMIT  32
 #define COMMAND_LIMIT   256
 #define TRANSFER_LIMIT  256
 
-- 
1.8.3.1