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 <stable@xxxxxxxxxxxxxxx> know about it.
>From 084a804e01205bcd74cd0849bc72cb5c88f8e648 Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq@xxxxxx>
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 <rogerq@xxxxxx>
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: <stable@xxxxxxxxxxxxxxx> # v4.12+
Suggested-by: Manu Gautam <mgautam@xxxxxxxxxxxxxx>
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxx are
queue-4.15/usb-dwc3-fix-lock-up-on-id-change-during-system-suspend-resume.patch