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[PATCH] USB hub: use usb_reset_composite_device 

This patch (as700) modifies the hub driver to take advantage of the new
usb_reset_composite_device API.  The existing code had special-case
calls stuck into usb_reset_device, just before and after the reset.
With the new version there's no need for special-case stuff; it all
happens naturally in the form of pre_reset and post_reset notifications.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2006-06-01 13:37:24 -04:00 committed by Greg Kroah-Hartman
parent 79efa097e7
commit 7de18d8bf4
1 changed files with 15 additions and 19 deletions
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34
drivers/usb/core/hub.c
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@ -525,15 +525,16 @@ static int hub_port_disable(struct usb_hub *hub, int port1, int set_state)
/* caller has locked the hub device */
static void hub_pre_reset(struct usb_hub *hub, int disable_ports)
static void hub_pre_reset(struct usb_interface *intf)
{
struct usb_hub *hub = usb_get_intfdata(intf);
struct usb_device *hdev = hub->hdev;
int port1;
for (port1 = 1; port1 <= hdev->maxchild; ++port1) {
if (hdev->children[port1 - 1]) {
usb_disconnect(&hdev->children[port1 - 1]);
if (disable_ports)
if (hub->error == 0)
hub_port_disable(hub, port1, 0);
}
}
@ -541,8 +542,10 @@ static void hub_pre_reset(struct usb_hub *hub, int disable_ports)
}
/* caller has locked the hub device */
static void hub_post_reset(struct usb_hub *hub)
static void hub_post_reset(struct usb_interface *intf)
{
struct usb_hub *hub = usb_get_intfdata(intf);
hub_activate(hub);
hub_power_on(hub);
}
@ -802,15 +805,16 @@ static void hub_disconnect(struct usb_interface *intf)
struct usb_hub *hub = usb_get_intfdata (intf);
struct usb_device *hdev;
/* Disconnect all children and quiesce the hub */
hub->error = 0;
hub_pre_reset(intf);
usb_set_intfdata (intf, NULL);
hdev = hub->hdev;
if (hdev->speed == USB_SPEED_HIGH)
highspeed_hubs--;
/* Disconnect all children and quiesce the hub */
hub_pre_reset(hub, 1);
usb_free_urb(hub->urb);
hub->urb = NULL;
@ -2747,7 +2751,8 @@ static void hub_events(void)
/* If the hub has died, clean up after it */
if (hdev->state == USB_STATE_NOTATTACHED) {
hub_pre_reset(hub, 0);
hub->error = -ENODEV;
hub_pre_reset(intf);
goto loop;
}
@ -2759,7 +2764,7 @@ static void hub_events(void)
dev_dbg (hub_dev, "resetting for error %d\n",
hub->error);
ret = usb_reset_device(hdev);
ret = usb_reset_composite_device(hdev, intf);
if (ret) {
dev_dbg (hub_dev,
"error resetting hub: %d\n", ret);
@ -2928,6 +2933,8 @@ static struct usb_driver hub_driver = {
.disconnect = hub_disconnect,
.suspend = hub_suspend,
.resume = hub_resume,
.pre_reset = hub_pre_reset,
.post_reset = hub_post_reset,
.ioctl = hub_ioctl,
.id_table = hub_id_table,
};
@ -3033,7 +3040,6 @@ int usb_reset_device(struct usb_device *udev)
struct usb_device *parent_hdev = udev->parent;
struct usb_hub *parent_hub;
struct usb_device_descriptor descriptor = udev->descriptor;
struct usb_hub *hub = NULL;
int i, ret = 0;
int port1 = udev->portnum;
@ -3051,14 +3057,6 @@ int usb_reset_device(struct usb_device *udev)
}
parent_hub = hdev_to_hub(parent_hdev);
/* If we're resetting an active hub, take some special actions */
if (udev->actconfig && udev->actconfig->desc.bNumInterfaces > 0 &&
udev->actconfig->interface[0]->dev.driver ==
&hub_driver.driver &&
(hub = hdev_to_hub(udev)) != NULL) {
hub_pre_reset(hub, 0);
}
set_bit(port1, parent_hub->busy_bits);
for (i = 0; i < SET_CONFIG_TRIES; ++i) {
@ -3117,8 +3115,6 @@ int usb_reset_device(struct usb_device *udev)
}
done:
if (hub)
hub_post_reset(hub);
return 0;
re_enumerate: