usb: dwc3: return error in case of run/stop timeout

Although timeout has never been experienced, still to make it
meaningful, its better to return error if it ever occurs.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 39626e3..aedc1c5 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1408,7 +1408,7 @@ static int dwc3_gadget_set_selfpowered(struct usb_gadget *g,
        return 0;
 }
 
-static void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on)
+static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on)
 {
        u32                     reg;
        u32                     timeout = 500;
@@ -1440,7 +1440,7 @@ static void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on)
                }
                timeout--;
                if (!timeout)
-                       break;
+                       return -ETIMEDOUT;
                udelay(1);
        } while (1);
 
@@ -1448,20 +1448,23 @@ static void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on)
                        dwc->gadget_driver
                        ? dwc->gadget_driver->function : "no-function",
                        is_on ? "connect" : "disconnect");
+
+       return 0;
 }
 
 static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
 {
        struct dwc3             *dwc = gadget_to_dwc(g);
        unsigned long           flags;
+       int                     ret;
 
        is_on = !!is_on;
 
        spin_lock_irqsave(&dwc->lock, flags);
-       dwc3_gadget_run_stop(dwc, is_on);
+       ret = dwc3_gadget_run_stop(dwc, is_on);
        spin_unlock_irqrestore(&dwc->lock, flags);
 
-       return 0;
+       return ret;
 }
 
 static int dwc3_gadget_start(struct usb_gadget *g,