usb: xhci: Bugfix for NULL pointer deference in xhci_endpoint_init() function

[pandora-kernel.git] / drivers / usb / host / xhci-mem.c

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 0f4a41d..d5d2af5 100644 (file)
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1330,10 +1330,10 @@ int xhci_endpoint_init(struct xhci_hcd *xhci,
                /* Attempt to use the ring cache */
                if (virt_dev->num_rings_cached == 0)
                        return -ENOMEM;
+               virt_dev->num_rings_cached--;
                virt_dev->eps[ep_index].new_ring =
                        virt_dev->ring_cache[virt_dev->num_rings_cached];
                virt_dev->ring_cache[virt_dev->num_rings_cached] = NULL;
-               virt_dev->num_rings_cached--;
                xhci_reinit_cached_ring(xhci, virt_dev->eps[ep_index].new_ring,
                        usb_endpoint_xfer_isoc(&ep->desc) ? true : false);
        }