This is a note to let you know that I've just added the patch titled
xhci: Improve the XHCI system resume time
to the 6.4-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:
xhci-improve-the-xhci-system-resume-time.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 96546d6f2828d88301ccc5052221e4fb5cc21de4
Author: Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx>
Date: Fri Apr 28 19:30:56 2023 +0530
xhci: Improve the XHCI system resume time
[ Upstream commit 1c024241d018cf9fc17aa8d95c3fe77d671d7142 ]
Avoid extra 120ms delay during system resume.
The xHC controller may signal wake up to 120ms before showing which usb
device caused the wake on the xHC port registers.
The xhci driver therefore checks for port activity up to 120ms during
resume, making sure that the hub driver can see the port change, and
won't immediately runtime suspend back due to no port activity.
This is however only needed for runtime resume as system resume will
resume all child hubs and other child usb devices anyway.
Fixes: 253f588c70f6 ("xhci: Improve detection of device initiated wake signal.")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx>
Acked-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230428140056.1318981-3-Basavaraj.Natikar@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 65d54c8a24928..b81313ffeb768 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1117,7 +1117,7 @@ int xhci_resume(struct xhci_hcd *xhci, pm_message_t msg)
* the first wake signalling failed, give it that chance.
*/
pending_portevent = xhci_pending_portevent(xhci);
- if (!pending_portevent) {
+ if (!pending_portevent && msg.event == PM_EVENT_AUTO_RESUME) {
msleep(120);
pending_portevent = xhci_pending_portevent(xhci);
}
