From: Gregory Herrero <gregory.herrero@intel.com>
Date: Wed, 29 Apr 2015 20:09:14 +0000 (+0200)
Subject: usb: dwc2: host: resume root hub on port connect
X-Git-Tag: v4.2-rc1~86^2~16^2~71
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a7714c1cb11dc3bb97a76d2bb0560415d155b1d5;p=platform%2Fkernel%2Flinux-exynos.git

usb: dwc2: host: resume root hub on port connect

Once hub is runtime suspended, dwc2 must resume it
on port connect event.
Else, roothub will stay in suspended state and will
not resume transfers.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c
index 551ba87..6927bba 100644
--- a/drivers/usb/dwc2/hcd_intr.c
+++ b/drivers/usb/dwc2/hcd_intr.c
@@ -350,6 +350,9 @@ static void dwc2_port_intr(struct dwc2_hsotg *hsotg)
 		dev_vdbg(hsotg->dev,
 			 "--Port Interrupt HPRT0=0x%08x Port Connect Detected--\n",
 			 hprt0);
+		if (hsotg->lx_state != DWC2_L0)
+			usb_hcd_resume_root_hub(hsotg->priv);
+
 		hsotg->flags.b.port_connect_status_change = 1;
 		hsotg->flags.b.port_connect_status = 1;
 		hprt0_modify |= HPRT0_CONNDET;