diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-pci.c | 2 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.c | 44 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 2 |
3 files changed, 41 insertions, 7 deletions
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index f7efe025beda..aefc3496376a 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -152,7 +152,7 @@ static const struct hc_driver xhci_pci_hc_driver = { .reset_bandwidth = xhci_reset_bandwidth, .address_device = xhci_address_device, .update_hub_device = xhci_update_hub_device, - .reset_device = xhci_reset_device, + .reset_device = xhci_discover_or_reset_device, /* * scheduling support diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 0bec04070334..7928af5c91cb 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1943,8 +1943,13 @@ int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, * Wait for the Reset Device command to finish. Remove all structures * associated with the endpoints that were disabled. Clear the input device * structure? Cache the rings? Reset the control endpoint 0 max packet size? + * + * If the virt_dev to be reset does not exist or does not match the udev, + * it means the device is lost, possibly due to the xHC restore error and + * re-initialization during S3/S4. In this case, call xhci_alloc_dev() to + * re-allocate the device. */ -int xhci_reset_device(struct usb_hcd *hcd, struct usb_device *udev) +int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) { int ret, i; unsigned long flags; @@ -1955,12 +1960,36 @@ int xhci_reset_device(struct usb_hcd *hcd, struct usb_device *udev) int timeleft; int last_freed_endpoint; - ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); + ret = xhci_check_args(hcd, udev, NULL, 0, false, __func__); if (ret <= 0) return ret; xhci = hcd_to_xhci(hcd); slot_id = udev->slot_id; virt_dev = xhci->devs[slot_id]; + if (!virt_dev) { + xhci_dbg(xhci, "The device to be reset with slot ID %u does " + "not exist. Re-allocate the device\n", slot_id); + ret = xhci_alloc_dev(hcd, udev); + if (ret == 1) + return 0; + else + return -EINVAL; + } + + if (virt_dev->udev != udev) { + /* If the virt_dev and the udev does not match, this virt_dev + * may belong to another udev. + * Re-allocate the device. + */ + xhci_dbg(xhci, "The device to be reset with slot ID %u does " + "not match the udev. Re-allocate the device\n", + slot_id); + ret = xhci_alloc_dev(hcd, udev); + if (ret == 1) + return 0; + else + return -EINVAL; + } xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id); /* Allocate the command structure that holds the struct completion. @@ -2176,12 +2205,17 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) virt_dev = xhci->devs[udev->slot_id]; - /* If this is a Set Address to an unconfigured device, setup ep 0 */ - if (!udev->config) + slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); + /* + * If this is the first Set Address since device plug-in or + * virt_device realloaction after a resume with an xHCI power loss, + * then set up the slot context. + */ + if (!slot_ctx->dev_info) xhci_setup_addressable_virt_dev(xhci, udev); + /* Otherwise, update the control endpoint ring enqueue pointer. */ else xhci_copy_ep0_dequeue_into_input_ctx(xhci, udev); - /* Otherwise, assume the core has the device configured how it wants */ xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index f03f140a7d9a..490409f918f2 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1389,7 +1389,7 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep); int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep); void xhci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep); -int xhci_reset_device(struct usb_hcd *hcd, struct usb_device *udev); +int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev); int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev); void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev); |
