If we don't read out the contents of the register
(in order to reinitialize 'reg' variable) we will
be writing unknown contents to the DCTL register
whenever we try to use dwc3_gadget_wakeup() function.
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/dwc3/gadget.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 0404833..867c476 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1307,6 +1307,7 @@ static int dwc3_gadget_wakeup(struct usb_gadget *g)
/* Recent versions do this automatically */
if (dwc->revision < DWC3_REVISION_194A) {
/* write zeroes to Link Change Request */
+ reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK;
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
}
--
1.7.10.2
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