From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:43794 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753075AbeCPNfU (ORCPT ); Fri, 16 Mar 2018 09:35:20 -0400 Subject: Patch "usb: dwc3: Fix lock-up on ID change during system suspend/resume" has been added to the 4.15-stable tree To: rogerq@ti.com, felipe.balbi@linux.intel.com, gregkh@linuxfoundation.org, mgautam@codeaurora.org, stable@vger.kernel.org Cc: , From: Date: Fri, 16 Mar 2018 14:34:07 +0100 Message-ID: <152120724774175@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled usb: dwc3: Fix lock-up on ID change during system suspend/resume to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-dwc3-fix-lock-up-on-id-change-during-system-suspend-resume.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 084a804e01205bcd74cd0849bc72cb5c88f8e648 Mon Sep 17 00:00:00 2001 From: Roger Quadros Date: Tue, 27 Feb 2018 12:41:41 +0200 Subject: usb: dwc3: Fix lock-up on ID change during system suspend/resume From: Roger Quadros commit 084a804e01205bcd74cd0849bc72cb5c88f8e648 upstream. To reproduce the lock up do the following - connect otg host adapter and a USB device to the dual-role port so that it is in host mode. - suspend to mem. - disconnect otg adapter. - resume the system. If we call dwc3_host_exit() before tasks are thawed xhci_plat_remove() seems to lock up at the second usb_remove_hcd() call. To work around this we queue the _dwc3_set_mode() work on the system_freezable_wq. Fixes: 41ce1456e1db ("usb: dwc3: core: make dwc3_set_mode() work properly") Cc: # v4.12+ Suggested-by: Manu Gautam Signed-off-by: Roger Quadros Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -174,7 +174,7 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 dwc->desired_dr_role = mode; spin_unlock_irqrestore(&dwc->lock, flags); - queue_work(system_power_efficient_wq, &dwc->drd_work); + queue_work(system_freezable_wq, &dwc->drd_work); } u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type) Patches currently in stable-queue which might be from rogerq@ti.com are queue-4.15/usb-dwc3-fix-lock-up-on-id-change-during-system-suspend-resume.patch