This is a note to let you know that I've just added the patch titled
usb: dwc2: Prevent core suspend when port connection flag is 0
to the 5.10-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-dwc2-prevent-core-suspend-when-port-connection-flag-is-0.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 93f672804bf2d7a49ef3fd96827ea6290ca1841e Mon Sep 17 00:00:00 2001
From: Artur Petrosyan <Arthur.Petrosyan@xxxxxxxxxxxx>
Date: Fri, 26 Mar 2021 14:25:09 +0400
Subject: usb: dwc2: Prevent core suspend when port connection flag is 0
From: Artur Petrosyan <Arthur.Petrosyan@xxxxxxxxxxxx>
commit 93f672804bf2d7a49ef3fd96827ea6290ca1841e upstream.
In host mode port connection status flag is "0" when loading
the driver. After loading the driver system asserts suspend
which is handled by "_dwc2_hcd_suspend()" function. Before
the system suspend the port connection status is "0". As
result need to check the "port_connect_status" if it is "0",
then skipping entering to suspend.
Cc: <stable@xxxxxxxxxxxxxxx> # 5.2
Fixes: 6f6d70597c15 ("usb: dwc2: bus suspend/resume for hosts with DWC2_POWER_DOWN_PARAM_NONE")
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210326102510.BDEDEA005D@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/dwc2/hcd.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -4322,7 +4322,8 @@ static int _dwc2_hcd_suspend(struct usb_
if (hsotg->op_state == OTG_STATE_B_PERIPHERAL)
goto unlock;
- if (hsotg->params.power_down > DWC2_POWER_DOWN_PARAM_PARTIAL)
+ if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL ||
+ hsotg->flags.b.port_connect_status == 0)
goto skip_power_saving;
/*
Patches currently in stable-queue which might be from Arthur.Petrosyan@xxxxxxxxxxxx are
queue-5.10/usb-dwc2-fix-hprt0.prtsusp-bit-setting-for-hikey-960-board.patch
queue-5.10/usb-dwc2-prevent-core-suspend-when-port-connection-flag-is-0.patch
