USB: reorganize code in hub.c

This patch (as1045) reorganizes some code in the hub driver.
hub_port_status() is moved earlier in the file, and a new hub_stop()
routine is created to do the work currently in hub_preset() (i.e.,
disconnect all child devices and quiesce the hub).

There are no functional changes.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index a42db75c2336e7a5f15cc4438d29af0ff9e16184..087e3bb70e090f4536417ca1156cea5abfc746f3 100644 (file)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -333,6 +333,27 @@ static int get_port_status(struct usb_device *hdev, int port1,
        return status;
 }
 
+static int hub_port_status(struct usb_hub *hub, int port1,
+               u16 *status, u16 *change)
+{
+       int ret;
+
+       mutex_lock(&hub->status_mutex);
+       ret = get_port_status(hub->hdev, port1, &hub->status->port);
+       if (ret < 4) {
+               dev_err(hub->intfdev,
+                       "%s failed (err = %d)\n", __func__, ret);
+               if (ret >= 0)
+                       ret = -EIO;
+       } else {
+               *status = le16_to_cpu(hub->status->port.wPortStatus);
+               *change = le16_to_cpu(hub->status->port.wPortChange);
+               ret = 0;
+       }
+       mutex_unlock(&hub->status_mutex);
+       return ret;
+}
+
 static void kick_khubd(struct usb_hub *hub)
 {
        unsigned long   flags;
@@ -610,9 +631,8 @@ static void hub_port_logical_disconnect(struct usb_hub *hub, int port1)
 }
 
 /* caller has locked the hub device */
-static int hub_pre_reset(struct usb_interface *intf)
+static void hub_stop(struct usb_hub *hub)
 {
-       struct usb_hub *hub = usb_get_intfdata(intf);
        struct usb_device *hdev = hub->hdev;
        int i;
 
@@ -622,6 +642,14 @@ static int hub_pre_reset(struct usb_interface *intf)
                        usb_disconnect(&hdev->children[i]);
        }
        hub_quiesce(hub);
+}
+
+/* caller has locked the hub device */
+static int hub_pre_reset(struct usb_interface *intf)
+{
+       struct usb_hub *hub = usb_get_intfdata(intf);
+
+       hub_stop(hub);
        return 0;
 }
 
@@ -910,7 +938,7 @@ static void hub_disconnect(struct usb_interface *intf)
 
        /* Disconnect all children and quiesce the hub */
        hub->error = 0;
-       hub_pre_reset(intf);
+       hub_stop(hub);
 
        usb_set_intfdata (intf, NULL);
 
@@ -1510,28 +1538,6 @@ out_authorized:
 }
 
 
-static int hub_port_status(struct usb_hub *hub, int port1,
-                              u16 *status, u16 *change)
-{
-       int ret;
-
-       mutex_lock(&hub->status_mutex);
-       ret = get_port_status(hub->hdev, port1, &hub->status->port);
-       if (ret < 4) {
-               dev_err (hub->intfdev,
-                       "%s failed (err = %d)\n", __FUNCTION__, ret);
-               if (ret >= 0)
-                       ret = -EIO;
-       } else {
-               *status = le16_to_cpu(hub->status->port.wPortStatus);
-               *change = le16_to_cpu(hub->status->port.wPortChange); 
-               ret = 0;
-       }
-       mutex_unlock(&hub->status_mutex);
-       return ret;
-}
-
-
 /* Returns 1 if @hub is a WUSB root hub, 0 otherwise */
 static unsigned hub_is_wusb(struct usb_hub *hub)
 {
@@ -2726,7 +2732,7 @@ static void hub_events(void)
                /* If the hub has died, clean up after it */
                if (hdev->state == USB_STATE_NOTATTACHED) {
                        hub->error = -ENODEV;
-                       hub_pre_reset(intf);
+                       hub_stop(hub);
                        goto loop;
                }