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Subject[ 009/128] USB: Increase reset timeout.
3.2-stable review patch.  If anyone has any objections, please let me know.


From: Sarah Sharp <>

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: Ben Hutchings <>
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 968ec37..b9ce5e8 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2499,7 +2499,7 @@ static unsigned hub_is_wusb(struct usb_hub *hub)
#define HUB_BH_RESET_TIME 50
-#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);

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