From: Artur Petrosyan Arthur.Petrosyan@synopsys.com
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@vger.kernel.org # 5.2 Fixes: 6f6d70597c15 ("usb: dwc2: bus suspend/resume for hosts with DWC2_POWER_DOWN_PARAM_NONE") Signed-off-by: Artur Petrosyan Arthur.Petrosyan@synopsys.com Link: https://lore.kernel.org/r/20210326102510.BDEDEA005D@mailhost.synopsys.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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;
/*