diff mbox series

[5.11,141/152] usb: dwc2: Prevent core suspend when port connection flag is 0

Message ID 20210405085038.803864285@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH April 5, 2021, 8:54 a.m. UTC 
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(-)
diff mbox series

Patch

--- 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;
 
 	/*