Patchwork [3.5.y.z,extended,stable] Patch "USB: Increase reset timeout." has been added to staging queue

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Submitter Herton Ronaldo Krzesinski
Date Jan. 23, 2013, 4:41 a.m.
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Download mbox | patch
Permalink /patch/214734/
State New
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Herton Ronaldo Krzesinski - Jan. 23, 2013, 4:41 a.m.
This is a note to let you know that I have just added a patch titled

    USB: Increase reset timeout.

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see



From 643fd1ee182bbbff621f0c0337907a9c303a0eeb Mon Sep 17 00:00:00 2001
From: Sarah Sharp <>
Date: Wed, 14 Nov 2012 17:16:52 -0800
Subject: [PATCH] USB: Increase reset timeout.

commit 77c7f072c87fa951e9a74805febf26466f31170c upstream.

John's NEC 0.96 xHCI host controller needs a longer timeout for a warm
reset to complete.  The logs show it takes 650ms to complete the warm
reset, so extend the hub reset timeout to 800ms to be on the safe side.

This commit should be backported to kernels as old as 3.2, that contain
the commit 75d7cf72ab9fa01dc70877aa5c68e8ef477229dc "usbcore: refine
warm reset logic".

Signed-off-by: Sarah Sharp <>
Acked-by: Alan Stern <>
Reported-by: John Covici <>
Signed-off-by: Herton Ronaldo Krzesinski <>
 drivers/usb/core/hub.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)



diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index ba01327..0b408c6 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2390,7 +2390,7 @@  static unsigned hub_is_wusb(struct usb_hub *hub)
 #define HUB_BH_RESET_TIME	50
 #define HUB_LONG_RESET_TIME	200
-#define HUB_RESET_TIMEOUT	500
+#define HUB_RESET_TIMEOUT	800

 static int hub_port_reset(struct usb_hub *hub, int port1,
 			struct usb_device *udev, unsigned int delay, bool warm);