[PATCH v1 05/14] usb: dwc2: Add port conn. sts. checking in _dwc2_hcd_resume() function.

[Artur Petrosyan]

Added port connection status checking which prevents exiting from
Partial Power Down mode from _dwc2_hcd_resume() when no entering
to Partial Power Down mode happened.

Signed-off-by: Artur Petrosyan <art...@synopsys.com>
---
 drivers/usb/dwc2/hcd.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 1d18258b5ff8..8367902a47eb 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -4544,6 +4544,9 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd)
        struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
        unsigned long flags;
        int ret = 0;
+       u32 hprt0;
+
+       hprt0 = dwc2_read_hprt0(hsotg);
 
        spin_lock_irqsave(&hsotg->lock, flags);
 
@@ -4553,7 +4556,8 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd)
        if (hsotg->lx_state != DWC2_L2)
                goto unlock;
 
-       if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL) {
+       if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL ||
+           hprt0 & HPRT0_CONNSTS) {
                hsotg->lx_state = DWC2_L0;
                goto unlock;
        }
-- 
2.11.0