redonkable/alistair23-linux
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usb: add struct usb_hub_port to store port related members.

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Add struct usb_hub_port pointer port_data in the struct usb_hub and allocate
struct usb_hub_port perspectively for each ports to store private data.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lan Tianyu 2012-05-11 16:08:29 +08:00 committed by Greg Kroah-Hartman
parent 54d3f8c63d
commit f397d7c4c5
1 changed files with 16 additions and 13 deletions
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29
drivers/usb/core/hub.c
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@ -37,6 +37,10 @@
#endif
#endif
struct usb_hub_port {
void *port_owner;
};
struct usb_hub {
struct device *intfdev; /* the "interface" device */
struct usb_device *hdev;
@ -81,7 +85,7 @@ struct usb_hub {
u8 indicator[USB_MAXCHILDREN];
struct delayed_work leds;
struct delayed_work init_work;
void **port_owners;
struct usb_hub_port *port_data;
};
static inline int hub_is_superspeed(struct usb_device *hdev)
@ -1049,8 +1053,9 @@ static int hub_configure(struct usb_hub *hub,
hdev->children = kzalloc(hdev->maxchild *
sizeof(struct usb_device *), GFP_KERNEL);
hub->port_owners = kzalloc(hdev->maxchild * sizeof(void *), GFP_KERNEL);
if (!hdev->children || !hub->port_owners) {
hub->port_data = kzalloc(hdev->maxchild * sizeof(struct usb_hub_port),
GFP_KERNEL);
if (!hub->port_data || !hdev->children) {
ret = -ENOMEM;
goto fail;
}
@ -1305,7 +1310,7 @@ static void hub_disconnect(struct usb_interface *intf)
usb_free_urb(hub->urb);
kfree(hdev->children);
kfree(hub->port_owners);
kfree(hub->port_data);
kfree(hub->descriptor);
kfree(hub->status);
kfree(hub->buffer);
@ -1437,7 +1442,7 @@ static int find_port_owner(struct usb_device *hdev, unsigned port1,
/* This assumes that devices not managed by the hub driver
* will always have maxchild equal to 0.
*/
*ppowner = &(hdev_to_hub(hdev)->port_owners[port1 - 1]);
*ppowner = &(hdev_to_hub(hdev)->port_data[port1 - 1].port_owner);
return 0;
}
@ -1472,16 +1477,14 @@ int usb_hub_release_port(struct usb_device *hdev, unsigned port1, void *owner)
void usb_hub_release_all_ports(struct usb_device *hdev, void *owner)
{
struct usb_hub *hub = hdev_to_hub(hdev);
int n;
void **powner;
n = find_port_owner(hdev, 1, &powner);
if (n == 0) {
for (; n < hdev->maxchild; (++n, ++powner)) {
if (*powner == owner)
*powner = NULL;
}
for (n = 0; n < hdev->maxchild; n++) {
if (hub->port_data[n].port_owner == owner)
hub->port_data[n].port_owner = NULL;
}
}
/* The caller must hold udev's lock */
@ -1492,7 +1495,7 @@ bool usb_device_is_owned(struct usb_device *udev)
if (udev->state == USB_STATE_NOTATTACHED || !udev->parent)
return false;
hub = hdev_to_hub(udev->parent);
return !!hub->port_owners[udev->portnum - 1];
return !!hub->port_data[udev->portnum - 1].port_owner;
}