Commit 79c3dd81 authored Nov 03, 2011 by Don Zickus Committed by Sarah Sharp Nov 04, 2011

usb, xhci: Clear warm reset change event during init



I noticed on my Panther Point system that I wasn't getting hotplug events
for my usb3.0 disk on a usb3 port.  I tracked it down to the fact that the
system had the warm reset change bit still set.  This seemed to block future
events from being received, including a hotplug event.

Clearing this bit during initialization allowed the hotplug event to be
received and the disk to be recognized correctly.

This patch should be backported to kernels as old as 2.6.39.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org

parent d31c285b

drivers/usb/core/hub.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -813,6 +813,12 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
		USB_PORT_FEAT_C_PORT_LINK_STATE);
		}

		if ((portchange & USB_PORT_STAT_C_BH_RESET) &&
		hub_is_superspeed(hub->hdev)) {
		need_debounce_delay = true;
		clear_port_feature(hub->hdev, port1,
		USB_PORT_FEAT_C_BH_PORT_RESET);
		}
		/* We can forget about a "removed" device when there's a
		* physical disconnect or the connect status changes.
		*/

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