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Date: Wed, 15 Jan 2014 13:50:39 -0800 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Julius Werner <jwerner@...omium.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.8 025/166] usb: hub: Use correct reset for wedged USB3 devices that are NOTATTACHED 3.8.13.16 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Julius Werner <jwerner@...omium.org> commit 2d51f3cd11f414c56a87dc018196b85fd50b04a4 upstream. This patch adds a check for USB_STATE_NOTATTACHED to the hub_port_warm_reset_required() workaround for ports that end up in Compliance Mode in hub_events() when trying to decide which reset function to use. Trying to call usb_reset_device() with a NOTATTACHED device will just fail and leave the port broken. Signed-off-by: Julius Werner <jwerner@...omium.org> Acked-by: Alan Stern <stern@...land.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> [ kamal: backport to 3.8 (context) ] Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- drivers/usb/core/hub.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 1ac190b..edbf39f 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -4764,7 +4764,9 @@ static void hub_events(void) hub->ports[i - 1]->child; dev_dbg(hub_dev, "warm reset port %d\n", i); - if (!udev) { + if (!udev || + !(portstatus & USB_PORT_STAT_CONNECTION) || + udev->state == USB_STATE_NOTATTACHED) { status = hub_port_reset(hub, i, NULL, HUB_BH_RESET_TIME, true); -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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