diff options
Diffstat (limited to 'drivers/usb/core/hub.c')
| -rw-r--r-- | drivers/usb/core/hub.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 27115b45edc5..4310cc4b1cb5 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -24,7 +24,6 @@ #include <linux/kthread.h> #include <linux/mutex.h> #include <linux/freezer.h> -#include <linux/pm_runtime.h> #include <asm/uaccess.h> #include <asm/byteorder.h> @@ -677,6 +676,8 @@ static void hub_init_func3(struct work_struct *ws); static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) { struct usb_device *hdev = hub->hdev; + struct usb_hcd *hcd; + int ret; int port1; int status; bool need_debounce_delay = false; @@ -715,6 +716,25 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) usb_autopm_get_interface_no_resume( to_usb_interface(hub->intfdev)); return; /* Continues at init2: below */ + } else if (type == HUB_RESET_RESUME) { + /* The internal host controller state for the hub device + * may be gone after a host power loss on system resume. + * Update the device's info so the HW knows it's a hub. + */ + hcd = bus_to_hcd(hdev->bus); + if (hcd->driver->update_hub_device) { + ret = hcd->driver->update_hub_device(hcd, hdev, + &hub->tt, GFP_NOIO); + if (ret < 0) { + dev_err(hub->intfdev, "Host not " + "accepting hub info " + "update.\n"); + dev_err(hub->intfdev, "LS/FS devices " + "and hubs may not work " + "under this hub\n."); + } + } + hub_power_on(hub, true); } else { hub_power_on(hub, true); } @@ -1804,8 +1824,15 @@ int usb_new_device(struct usb_device *udev) /* Tell the runtime-PM framework the device is active */ pm_runtime_set_active(&udev->dev); + pm_runtime_get_noresume(&udev->dev); + pm_runtime_use_autosuspend(&udev->dev); pm_runtime_enable(&udev->dev); + /* By default, forbid autosuspend for all devices. It will be + * allowed for hubs during binding. + */ + usb_disable_autosuspend(udev); + err = usb_enumerate_device(udev); /* Read descriptors */ if (err < 0) goto fail; @@ -1831,6 +1858,8 @@ int usb_new_device(struct usb_device *udev) } (void) usb_create_ep_devs(&udev->dev, &udev->ep0, udev); + usb_mark_last_busy(udev); + pm_runtime_put_sync_autosuspend(&udev->dev); return err; fail: @@ -2221,6 +2250,7 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg) usb_set_device_state(udev, USB_STATE_SUSPENDED); msleep(10); } + usb_mark_last_busy(hub->hdev); return status; } |