Commit 93f67280 authored by Artur Petrosyan's avatar Artur Petrosyan Committed by Greg Kroah-Hartman
Browse files

usb: dwc2: Prevent core suspend when port connection flag is 0 



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@vger.kernel.org> # 5.2
Fixes: 6f6d7059 ("usb: dwc2: bus suspend/resume for hosts with DWC2_POWER_DOWN_PARAM_NONE")
Signed-off-by: default avatarArtur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210326102510.BDEDEA005D@mailhost.synopsys.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5e3bbae8

drivers/usb/dwc2/hcd.c

+2 −1
Original line number Diff line number Diff line
@@ -4322,7 +4322,8 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) 
	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;



	/*