From: Gregory Herrero <gregory.herrero@intel.com>
Date: Tue, 22 Sep 2015 13:16:37 +0000 (+0200)
Subject: usb: dwc2: host: don't clear hprt0 status bits when exiting hibernation
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=cc047ce4be6188d3bd3997b44ec724ce390fbdcb;p=deliverable%2Flinux.git

usb: dwc2: host: don't clear hprt0 status bits when exiting hibernation

When entering hibernation hprt0 must be read using dwc2_read_hprt0().
Otherwise, any set hprt0 status bits will be cleared when restoring
hprt0 on exit from hibernation.

Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index fc0521aeed77..0bfc987dd373 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -78,7 +78,7 @@ static int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg)
 	for (i = 0; i < hsotg->core_params->host_channels; ++i)
 		hr->hcintmsk[i] = dwc2_readl(hsotg->regs + HCINTMSK(i));
 
-	hr->hprt0 = dwc2_readl(hsotg->regs + HPRT0);
+	hr->hprt0 = dwc2_read_hprt0(hsotg);
 	hr->hfir = dwc2_readl(hsotg->regs + HFIR);
 	hr->valid = true;