diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/hcd.h | 5 | ||||
| -rw-r--r-- | drivers/usb/core/hub.c | 14 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-pci.c | 1 |
3 files changed, 20 insertions, 0 deletions
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h index ec5c67ea07b..79782a1c43f 100644 --- a/drivers/usb/core/hcd.h +++ b/drivers/usb/core/hcd.h @@ -267,6 +267,11 @@ struct hc_driver { void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *); /* Returns the hardware-chosen device address */ int (*address_device)(struct usb_hcd *, struct usb_device *udev); + /* Notifies the HCD after a hub descriptor is fetched. + * Will block. + */ + int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev, + struct usb_tt *tt, gfp_t mem_flags); }; extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb); diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index a880516020f..5ce839137ad 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -860,6 +860,7 @@ static int hub_post_reset(struct usb_interface *intf) static int hub_configure(struct usb_hub *hub, struct usb_endpoint_descriptor *endpoint) { + struct usb_hcd *hcd; struct usb_device *hdev = hub->hdev; struct device *hub_dev = hub->intfdev; u16 hubstatus, hubchange; @@ -1061,6 +1062,19 @@ static int hub_configure(struct usb_hub *hub, dev_dbg(hub_dev, "%umA bus power budget for each child\n", hub->mA_per_port); + /* Update the HCD's internal representation of this hub before khubd + * starts getting port status changes for devices under the hub. + */ + hcd = bus_to_hcd(hdev->bus); + if (hcd->driver->update_hub_device) { + ret = hcd->driver->update_hub_device(hcd, hdev, + &hub->tt, GFP_KERNEL); + if (ret < 0) { + message = "can't update HCD hub info"; + goto fail; + } + } + ret = hub_hub_status(hub, &hubstatus, &hubchange); if (ret < 0) { message = "can't get hub status"; diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index b7712f22a9f..06595ec27bb 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -136,6 +136,7 @@ static const struct hc_driver xhci_pci_hc_driver = { .check_bandwidth = xhci_check_bandwidth, .reset_bandwidth = xhci_reset_bandwidth, .address_device = xhci_address_device, + .update_hub_device = xhci_update_hub_device, /* * scheduling support |