xhci: remove BUG() in xhci_get_endpoint_type()

If the endpoint type is unknown, set it to 0 and fail gracefully
instead of causing a kernel panic.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 6072f11..b0d789e 100644 (file)
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1329,7 +1329,7 @@ static u32 xhci_get_endpoint_type(struct usb_device *udev,
                else
                        type = EP_TYPE(INT_OUT_EP);
        } else {
-               BUG();
+               type = 0;
        }
        return type;
 }
@@ -1375,10 +1375,16 @@ int xhci_endpoint_init(struct xhci_hcd *xhci,
        unsigned int max_burst;
        enum xhci_ring_type type;
        u32 max_esit_payload;
+       u32 endpoint_type;
 
        ep_index = xhci_get_endpoint_index(&ep->desc);
        ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
 
+       endpoint_type = xhci_get_endpoint_type(udev, ep);
+       if (!endpoint_type)
+               return -EINVAL;
+       ep_ctx->ep_info2 = cpu_to_le32(endpoint_type);
+
        type = usb_endpoint_type(&ep->desc);
        /* Set up the endpoint ring */
        virt_dev->eps[ep_index].new_ring =
@@ -1407,11 +1413,9 @@ int xhci_endpoint_init(struct xhci_hcd *xhci,
         * CErr shall be set to 0 for Isoch endpoints.
         */
        if (!usb_endpoint_xfer_isoc(&ep->desc))
-               ep_ctx->ep_info2 = cpu_to_le32(ERROR_COUNT(3));
+               ep_ctx->ep_info2 |= cpu_to_le32(ERROR_COUNT(3));
        else
-               ep_ctx->ep_info2 = cpu_to_le32(ERROR_COUNT(0));
-
-       ep_ctx->ep_info2 |= cpu_to_le32(xhci_get_endpoint_type(udev, ep));
+               ep_ctx->ep_info2 |= cpu_to_le32(ERROR_COUNT(0));
 
        /* Set the max packet size and max burst */
        max_packet = GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc));