usb: gadget: aspeed: Don't reject requests on suspended devices

A disconnect may just suspend the hub in absence of a physical disconnect detection. If we start rejecting requests, the mass storage function gets into a spin trying to requeue the same request for ever and hangs. Signed-off-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Felipe Balbi <[email protected]>
ashr · Aug 12, 2019 · ef9d346 · ef9d346
1 parent 7e420ce
commit ef9d346
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Showing 3 changed files with 11 additions and 6 deletions.
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
@@ -204,14 +204,19 @@ int ast_vhub_std_dev_request(struct ast_vhub_ep *ep,
 	u16 wValue, wIndex;
 
 	/* No driver, we shouldn't be enabled ... */
-	if (!d->driver || !d->enabled || d->suspended) {
+	if (!d->driver || !d->enabled) {
 		EPDBG(ep,
-		      "Device is wrong state driver=%p enabled=%d"
-		      " suspended=%d\n",
-		      d->driver, d->enabled, d->suspended);
+		      "Device is wrong state driver=%p enabled=%d\n",
+		      d->driver, d->enabled);
 		return std_req_stall;
 	}
 
+	/*
+	 * Note: we used to reject/stall requests while suspended,
+	 * we don't do that anymore as we seem to have cases of
+	 * mass storage getting very upset.
+	 */
+
 	/* First packet, grab speed */
 	if (d->gadget.speed == USB_SPEED_UNKNOWN) {
 		d->gadget.speed = ep->vhub->speed;

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
@@ -379,7 +379,7 @@ static int ast_vhub_ep0_queue(struct usb_ep* u_ep, struct usb_request *u_req,
 		return -EINVAL;
 
 	/* Disabled device */
-	if (ep->dev && (!ep->dev->enabled || ep->dev->suspended))
+	if (ep->dev && !ep->dev->enabled)
 		return -ESHUTDOWN;
 
 	/* Data, no buffer and not internal ? */

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
@@ -352,7 +352,7 @@ static int ast_vhub_epn_queue(struct usb_ep* u_ep, struct usb_request *u_req,
 
 	/* Endpoint enabled ? */
 	if (!ep->epn.enabled || !u_ep->desc || !ep->dev || !ep->d_idx ||
-	    !ep->dev->enabled || ep->dev->suspended) {
+	    !ep->dev->enabled) {
 		EPDBG(ep, "Enqueuing request on wrong or disabled EP\n");
 		return -ESHUTDOWN;
 	}