xhci: fix incorrect type in assignment in handle_device_notification()

This patch converts Event TRB's 3rd field, which has type le32, to CPU
byteorder before using it to retrieve the Slot ID with TRB_TO_SLOT_ID macro.
This bug was found using sparse.

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 1e2f3f4..22da093 100644 (file)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1655,7 +1655,7 @@ static void handle_device_notification(struct xhci_hcd *xhci,
        u32 slot_id;
        struct usb_device *udev;
 
-       slot_id = TRB_TO_SLOT_ID(event->generic.field[3]);
+       slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->generic.field[3]));
        if (!xhci->devs[slot_id]) {
                xhci_warn(xhci, "Device Notification event for "
                                "unused slot %u\n", slot_id);