diff options
Diffstat (limited to 'drivers/usb/host/xhci-hub.c')
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index 24835718b9c6..dde46d1d5f6f 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -1324,7 +1324,16 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, xhci_set_link_state(xhci, ports[wIndex], link_state); spin_unlock_irqrestore(&xhci->lock, flags); - msleep(20); /* wait device to enter */ + if (link_state == USB_SS_PORT_LS_U3) { + int retries = 16; + + while (retries--) { + usleep_range(4000, 8000); + temp = readl(ports[wIndex]->addr); + if ((temp & PORT_PLS_MASK) == XDEV_U3) + break; + } + } spin_lock_irqsave(&xhci->lock, flags); temp = readl(ports[wIndex]->addr); |