usb: dwc3: take lock while modifying flags
dwc3_gadget_ep_set_wedge() and dwc3_gadget_set_selfpowered() were
modifying dwc->flags/dwc->is_selfpowered without taking the lock.
Since those modifications are non-atomic, that could cause other
flags to be corrupted. Fix them both to take the lock.
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index e2633dd..bfdfd4f 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1196,8 +1196,12 @@
static int dwc3_gadget_ep_set_wedge(struct usb_ep *ep)
{
struct dwc3_ep *dep = to_dwc3_ep(ep);
+ struct dwc3 *dwc = dep->dwc;
+ unsigned long flags;
+ spin_lock_irqsave(&dwc->lock, flags);
dep->flags |= DWC3_EP_WEDGE;
+ spin_unlock_irqrestore(&dwc->lock, flags);
return dwc3_gadget_ep_set_halt(ep, 1);
}
@@ -1323,8 +1327,11 @@
int is_selfpowered)
{
struct dwc3 *dwc = gadget_to_dwc(g);
+ unsigned long flags;
+ spin_lock_irqsave(&dwc->lock, flags);
dwc->is_selfpowered = !!is_selfpowered;
+ spin_unlock_irqrestore(&dwc->lock, flags);
return 0;
}