xhci-mem.c: Check for ring->first_seg != NULL

[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 94a8b28..e4513ab 100644 (file)
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -112,18 +112,20 @@ void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring)
        struct xhci_segment *seg;
        struct xhci_segment *first_seg;
 
-       if (!ring || !ring->first_seg)
+       if (!ring)
                return;
-       first_seg = ring->first_seg;
-       seg = first_seg->next;
-       xhci_dbg(xhci, "Freeing ring at %p\n", ring);
-       while (seg != first_seg) {
-               struct xhci_segment *next = seg->next;
-               xhci_segment_free(xhci, seg);
-               seg = next;
+       if (ring->first_seg) {
+               first_seg = ring->first_seg;
+               seg = first_seg->next;
+               xhci_dbg(xhci, "Freeing ring at %p\n", ring);
+               while (seg != first_seg) {
+                       struct xhci_segment *next = seg->next;
+                       xhci_segment_free(xhci, seg);
+                       seg = next;
+               }
+               xhci_segment_free(xhci, first_seg);
+               ring->first_seg = NULL;
        }
-       xhci_segment_free(xhci, first_seg);
-       ring->first_seg = NULL;
        kfree(ring);
 }