diff options
Diffstat (limited to 'drivers/usb/core/hub.c')
| -rw-r--r-- | drivers/usb/core/hub.c | 48 |
1 files changed, 18 insertions, 30 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 40c6c50..dd3bcfb 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -32,7 +32,7 @@ #include "hub.h" /* Protect struct usb_device->state and ->children members - * Note: Both are also protected by ->serialize, except that ->state can + * Note: Both are also protected by ->dev.sem, except that ->state can * change to USB_STATE_NOTATTACHED even when the semaphore isn't held. */ static DEFINE_SPINLOCK(device_state_lock); @@ -975,8 +975,8 @@ static int locktree(struct usb_device *udev) /* when everyone grabs locks top->bottom, * non-overlapping work may be concurrent */ - down(&udev->serialize); - up(&hdev->serialize); + usb_lock_device(udev); + usb_unlock_device(hdev); return t + 1; } } @@ -1132,16 +1132,10 @@ void usb_disconnect(struct usb_device **pdev) * this quiesces everyting except pending urbs. */ usb_set_device_state(udev, USB_STATE_NOTATTACHED); - - /* lock the bus list on behalf of HCDs unregistering their root hubs */ - if (!udev->parent) { - down(&usb_bus_list_lock); - usb_lock_device(udev); - } else - down(&udev->serialize); - dev_info (&udev->dev, "USB disconnect, address %d\n", udev->devnum); + usb_lock_device(udev); + /* Free up all the children before we remove this device */ for (i = 0; i < USB_MAXCHILDREN; i++) { if (udev->children[i]) @@ -1169,11 +1163,7 @@ void usb_disconnect(struct usb_device **pdev) *pdev = NULL; spin_unlock_irq(&device_state_lock); - if (!udev->parent) { - usb_unlock_device(udev); - up(&usb_bus_list_lock); - } else - up(&udev->serialize); + usb_unlock_device(udev); device_unregister(&udev->dev); } @@ -1243,8 +1233,8 @@ static inline void show_string(struct usb_device *udev, char *id, char *string) * * This is called with devices which have been enumerated, but not yet * configured. The device descriptor is available, but not descriptors - * for any device configuration. The caller must have locked udev and - * either the parent hub (if udev is a normal device) or else the + * for any device configuration. The caller must have locked either + * the parent hub (if udev is a normal device) or else the * usb_bus_list_lock (if udev is a root hub). The parent's pointer to * udev has already been installed, but udev is not yet visible through * sysfs or other filesystem code. @@ -1254,8 +1244,7 @@ static inline void show_string(struct usb_device *udev, char *id, char *string) * * This call is synchronous, and may not be used in an interrupt context. * - * Only the hub driver should ever call this; root hub registration - * uses it indirectly. + * Only the hub driver or root-hub registrar should ever call this. */ int usb_new_device(struct usb_device *udev) { @@ -1364,6 +1353,8 @@ int usb_new_device(struct usb_device *udev) } usb_create_sysfs_dev_files (udev); + usb_lock_device(udev); + /* choose and set the configuration. that registers the interfaces * with the driver core, and lets usb device drivers bind to them. */ @@ -1385,6 +1376,8 @@ int usb_new_device(struct usb_device *udev) /* USB device state == configured ... usable */ usb_notify_add_device(udev); + usb_unlock_device(udev); + return 0; fail: @@ -1872,11 +1865,8 @@ int usb_resume_device(struct usb_device *udev) usb_unlock_device(udev); /* rebind drivers that had no suspend() */ - if (status == 0) { - usb_lock_all_devices(); + if (status == 0) bus_rescan_devices(&usb_bus_type); - usb_unlock_all_devices(); - } return status; } @@ -1889,14 +1879,14 @@ static int remote_wakeup(struct usb_device *udev) /* don't repeat RESUME sequence if this device * was already woken up by some other task */ - down(&udev->serialize); + usb_lock_device(udev); if (udev->state == USB_STATE_SUSPENDED) { dev_dbg(&udev->dev, "RESUME (wakeup)\n"); /* TRSMRCY = 10 msec */ msleep(10); status = finish_device_resume(udev); } - up(&udev->serialize); + usb_unlock_device(udev); #endif return status; } @@ -1997,7 +1987,7 @@ static int hub_resume(struct usb_interface *intf) if (!udev || status < 0) continue; - down (&udev->serialize); + usb_lock_device(udev); if (portstat & USB_PORT_STAT_SUSPEND) status = hub_port_resume(hub, port1, udev); else { @@ -2008,7 +1998,7 @@ static int hub_resume(struct usb_interface *intf) hub_port_logical_disconnect(hub, port1); } } - up(&udev->serialize); + usb_unlock_device(udev); } } #endif @@ -2573,7 +2563,6 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1, * udev becomes globally accessible, although presumably * no one will look at it until hdev is unlocked. */ - down (&udev->serialize); status = 0; /* We mustn't add new devices if the parent hub has @@ -2597,7 +2586,6 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1, } } - up (&udev->serialize); if (status) goto loop_disable; |