From: Greg Kroah-Hartman <gregkh@suse.de>
Date: Thu, 17 Feb 2011 22:39:36 +0000 (-0800)
Subject: Revert "USB: Reset USB 3.0 devices on (re)discovery"
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9ce4f80fb67b47b96c647ac6280a06dbd4bb50d2;p=linux-beck.git

Revert "USB: Reset USB 3.0 devices on (re)discovery"

This reverts commit 637d11bfb814637ec7b81e878db3ffea6408a89a.  Sarah
wants to tweak it some more before it's applied to the tree.

Cc: Luben Tuikov <ltuikov@yahoo.com>
Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 0f299b7aad60..d041c6826e43 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2681,13 +2681,17 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 
 	mutex_lock(&usb_address0_mutex);
 
-	/* Reset the device; full speed may morph to high speed */
-	/* FIXME a USB 2.0 device may morph into SuperSpeed on reset. */
-	retval = hub_port_reset(hub, port1, udev, delay);
-	if (retval < 0)		/* error or disconnect */
-		goto fail;
-	/* success, speed is known */
-
+	if (!udev->config && oldspeed == USB_SPEED_SUPER) {
+		/* Don't reset USB 3.0 devices during an initial setup */
+		usb_set_device_state(udev, USB_STATE_DEFAULT);
+	} else {
+		/* Reset the device; full speed may morph to high speed */
+		/* FIXME a USB 2.0 device may morph into SuperSpeed on reset. */
+		retval = hub_port_reset(hub, port1, udev, delay);
+		if (retval < 0)		/* error or disconnect */
+			goto fail;
+		/* success, speed is known */
+	}
 	retval = -ENODEV;
 
 	if (oldspeed != USB_SPEED_UNKNOWN && oldspeed != udev->speed) {