diff options
Diffstat (limited to 'drivers/usb/host/ehci-q.c')
| -rw-r--r-- | drivers/usb/host/ehci-q.c | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c index 5aa7cec..666f051 100644 --- a/drivers/usb/host/ehci-q.c +++ b/drivers/usb/host/ehci-q.c @@ -1002,12 +1002,6 @@ static void qh_link_async (struct ehci_hcd *ehci, struct ehci_qh *qh) head->qh_next.qh = qh; head->hw->hw_next = dma; - /* - * flush qh descriptor into memory immediately, - * see comments in qh_append_tds. - * */ - ehci_sync_mem(); - qh_get(qh); qh->xacterrs = 0; qh->qh_state = QH_STATE_LINKED; @@ -1095,18 +1089,6 @@ static struct ehci_qh *qh_append_tds ( wmb (); dummy->hw_token = token; - /* - * Writing to dma coherent buffer on ARM may - * be delayed to reach memory, so HC may not see - * hw_token of dummy qtd in time, which can cause - * the qtd transaction to be executed very late, - * and degrade performance a lot. ehci_sync_mem - * is added to flush 'token' immediatelly into - * memory, so that ehci can execute the transaction - * ASAP. - * */ - ehci_sync_mem(); - urb->hcpriv = qh_get (qh); } } |