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path: root/drivers/usb/host/xhci-ring.c
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Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
-rw-r--r--drivers/usb/host/xhci-ring.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 5677b81c0915..cf0c93a90200 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2931,6 +2931,8 @@ static void queue_trb(struct xhci_hcd *xhci, struct xhci_ring *ring,
trb->field[0] = cpu_to_le32(field1);
trb->field[1] = cpu_to_le32(field2);
trb->field[2] = cpu_to_le32(field3);
+ /* make sure TRB is fully written before giving it to the controller */
+ wmb();
trb->field[3] = cpu_to_le32(field4);
trace_xhci_queue_trb(ring, trb);