diff options
Diffstat (limited to 'drivers/usb/host/ehci-q.c')
| -rw-r--r-- | drivers/usb/host/ehci-q.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c index 08fdcfa..7321920 100644 --- a/drivers/usb/host/ehci-q.c +++ b/drivers/usb/host/ehci-q.c @@ -506,6 +506,11 @@ qh_completions (struct ehci_hcd *ehci, struct ehci_qh *qh) last = list_entry (qtd->qtd_list.prev, struct ehci_qtd, qtd_list); last->hw_next = qtd->hw_next; + /* + * Make sure the new hw_next pointer is visible + * to the HW before freeing the old one + */ + wmb(); } /* remove qtd; it's recycled after possible urb completion */ |