usb: xhci: Free the right ring in xhci_add_endpoint()

In the xhci_add_endpoint(), a new ring was allocated and saved at
xhci_virt_ep->new_ring. Hence, when error happens, we need to free
the allocated ring before returning error.

Current code frees xhci_virt_ep->ring instead of the new_ring. This
patch fixes this.

Cc: <stable@vger.kernel.org>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index b2ff1ff..ee198ea 100644 (file)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1703,7 +1703,8 @@ static int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
        if (xhci->quirks & XHCI_MTK_HOST) {
                ret = xhci_mtk_add_ep_quirk(hcd, udev, ep);
                if (ret < 0) {
-                       xhci_free_endpoint_ring(xhci, virt_dev, ep_index);
+                       xhci_ring_free(xhci, virt_dev->eps[ep_index].new_ring);
+                       virt_dev->eps[ep_index].new_ring = NULL;
                        return ret;
                }
        }