diff options
| -rw-r--r-- | drivers/usb/host/xhci.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 08fbabff23a0..7d5b94905b9c 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -3077,6 +3077,9 @@ done: * of an endpoint that isn't in the halted state this function will issue a * configure endpoint command with the Drop and Add bits set for the target * endpoint. Refer to the additional note in xhci spcification section 4.6.8. + * + * vdev may be lost due to xHC restore error and re-initialization during S3/S4 + * resume. A new vdev will be allocated later by xhci_discover_or_reset_device() */ static void xhci_endpoint_reset(struct usb_hcd *hcd, @@ -3102,9 +3105,17 @@ static void xhci_endpoint_reset(struct usb_hcd *hcd, * mismatch. Reconfigure the xhci ep0 endpoint context here in that case */ if (usb_endpoint_xfer_control(&host_ep->desc) && ep_index == 0) { + udev = container_of(host_ep, struct usb_device, ep0); - if (udev->speed == USB_SPEED_FULL) - xhci_check_ep0_maxpacket(xhci, xhci->devs[udev->slot_id]); + if (udev->speed != USB_SPEED_FULL || !udev->slot_id) + return; + + vdev = xhci->devs[udev->slot_id]; + if (!vdev || vdev->udev != udev) + return; + + xhci_check_ep0_maxpacket(xhci, vdev); + /* Nothing else should be done here for ep0 during ep reset */ return; } @@ -3114,11 +3125,6 @@ static void xhci_endpoint_reset(struct usb_hcd *hcd, udev = (struct usb_device *) host_ep->hcpriv; vdev = xhci->devs[udev->slot_id]; - /* - * vdev may be lost due to xHC restore error and re-initialization - * during S3/S4 resume. A new vdev will be allocated later by - * xhci_discover_or_reset_device() - */ if (!udev->slot_id || !vdev) return; |