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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-05-14 09:20:37 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-05-14 09:20:37 -0700
commitfa286188ce0fce994c3fc2bddcafeb948834591f (patch)
tree72abc08a625c4341fc6606fdd547ed320b81fc66 /drivers/usb/core/hub.c
parente44694e858ed000ef11ee37861c7f7c86d8ddbda (diff)
Revert "usb: move struct usb_device->children to struct usb_hub_port->child"
This reverts commit bebc56d58dc780539777d2b1ca80df5566e2ad87. The call here is fragile and not well thought out, so revert it, it's not fully baked yet and I don't want this to go into 3.5. Cc: Lan Tianyu <tianyu.lan@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/core/hub.c')
-rw-r--r--drivers/usb/core/hub.c67
1 files changed, 27 insertions, 40 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 6bf7124fdf9..0c17d5a91d7 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -39,7 +39,6 @@
struct usb_hub_port {
void *port_owner;
- struct usb_device *child;
};
struct usb_hub {
@@ -94,7 +93,7 @@ static inline int hub_is_superspeed(struct usb_device *hdev)
return (hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS);
}
-/* Protect struct usb_device->state and struct usb_hub_port->child members
+/* Protect struct usb_device->state and ->children members
* 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);
@@ -177,7 +176,7 @@ static inline char *portspeed(struct usb_hub *hub, int portstatus)
/* Note that hdev or one of its children must be locked! */
static struct usb_hub *hdev_to_hub(struct usb_device *hdev)
{
- if (!hdev || !hdev->actconfig || !hdev->maxchild)
+ if (!hdev || !hdev->actconfig)
return NULL;
return usb_get_intfdata(hdev->actconfig->interface[0]);
}
@@ -650,8 +649,8 @@ static int hub_port_disable(struct usb_hub *hub, int port1, int set_state)
struct usb_device *hdev = hub->hdev;
int ret = 0;
- if (hub->port_data[port1-1].child && set_state)
- usb_set_device_state(hub->port_data[port1-1].child,
+ if (hdev->children[port1-1] && set_state)
+ usb_set_device_state(hdev->children[port1-1],
USB_STATE_NOTATTACHED);
if (!hub->error && !hub_is_superspeed(hub->hdev))
ret = clear_port_feature(hdev, port1, USB_PORT_FEAT_ENABLE);
@@ -807,7 +806,7 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
* which ports need attention.
*/
for (port1 = 1; port1 <= hdev->maxchild; ++port1) {
- struct usb_device *udev = hub->port_data[port1-1].child;
+ struct usb_device *udev = hdev->children[port1-1];
u16 portstatus, portchange;
portstatus = portchange = 0;
@@ -972,8 +971,8 @@ static void hub_quiesce(struct usb_hub *hub, enum hub_quiescing_type type)
if (type != HUB_SUSPEND) {
/* Disconnect all the children */
for (i = 0; i < hdev->maxchild; ++i) {
- if (hub->port_data[i].child)
- usb_disconnect(&hub->port_data[i].child);
+ if (hdev->children[i])
+ usb_disconnect(&hdev->children[i]);
}
}
@@ -1052,9 +1051,11 @@ static int hub_configure(struct usb_hub *hub,
dev_info (hub_dev, "%d port%s detected\n", hdev->maxchild,
(hdev->maxchild == 1) ? "" : "s");
+ hdev->children = kzalloc(hdev->maxchild *
+ sizeof(struct usb_device *), GFP_KERNEL);
hub->port_data = kzalloc(hdev->maxchild * sizeof(struct usb_hub_port),
GFP_KERNEL);
- if (!hub->port_data) {
+ if (!hub->port_data || !hdev->children) {
ret = -ENOMEM;
goto fail;
}
@@ -1286,6 +1287,7 @@ static unsigned highspeed_hubs;
static void hub_disconnect(struct usb_interface *intf)
{
struct usb_hub *hub = usb_get_intfdata(intf);
+ struct usb_device *hdev = interface_to_usbdev(intf);
/* Take the hub off the event list and don't let it be added again */
spin_lock_irq(&hub_event_lock);
@@ -1307,6 +1309,7 @@ static void hub_disconnect(struct usb_interface *intf)
highspeed_hubs--;
usb_free_urb(hub->urb);
+ kfree(hdev->children);
kfree(hub->port_data);
kfree(hub->descriptor);
kfree(hub->status);
@@ -1394,7 +1397,6 @@ static int
hub_ioctl(struct usb_interface *intf, unsigned int code, void *user_data)
{
struct usb_device *hdev = interface_to_usbdev (intf);
- struct usb_hub *hub = usb_get_intfdata(intf);
/* assert ifno == 0 (part of hub spec) */
switch (code) {
@@ -1408,11 +1410,11 @@ hub_ioctl(struct usb_interface *intf, unsigned int code, void *user_data)
else {
info->nports = hdev->maxchild;
for (i = 0; i < info->nports; i++) {
- if (hub->port_data[i].child == NULL)
+ if (hdev->children[i] == NULL)
info->port[i] = 0;
else
info->port[i] =
- hub->port_data[i].child->devnum;
+ hdev->children[i]->devnum;
}
}
spin_unlock_irq(&device_state_lock);
@@ -1499,13 +1501,11 @@ bool usb_device_is_owned(struct usb_device *udev)
static void recursively_mark_NOTATTACHED(struct usb_device *udev)
{
- struct usb_hub *hub = hdev_to_hub(udev);
int i;
for (i = 0; i < udev->maxchild; ++i) {
- if (hub->port_data[i].child)
- recursively_mark_NOTATTACHED(
- hub->port_data[i].child);
+ if (udev->children[i])
+ recursively_mark_NOTATTACHED(udev->children[i]);
}
if (udev->state == USB_STATE_SUSPENDED)
udev->active_duration -= jiffies;
@@ -1669,7 +1669,6 @@ static void hub_free_dev(struct usb_device *udev)
void usb_disconnect(struct usb_device **pdev)
{
struct usb_device *udev = *pdev;
- struct usb_hub *hub = hdev_to_hub(udev);
int i;
/* mark the device as inactive, so any further urb submissions for
@@ -1684,8 +1683,8 @@ void usb_disconnect(struct usb_device **pdev)
/* Free up all the children before we remove this device */
for (i = 0; i < udev->maxchild; i++) {
- if (hub->port_data[i].child)
- usb_disconnect(&hub->port_data[i].child);
+ if (udev->children[i])
+ usb_disconnect(&udev->children[i]);
}
/* deallocate hcd/hardware state ... nuking all pending urbs and
@@ -2766,7 +2765,7 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg)
for (port1 = 1; port1 <= hdev->maxchild; port1++) {
struct usb_device *udev;
- udev = hub->port_data[port1-1].child;
+ udev = hdev->children [port1-1];
if (udev && udev->can_submit) {
dev_warn(&intf->dev, "port %d nyet suspended\n", port1);
if (PMSG_IS_AUTO(msg))
@@ -3267,7 +3266,7 @@ hub_power_remaining (struct usb_hub *hub)
remaining = hdev->bus_mA - hub->descriptor->bHubContrCurrent;
for (port1 = 1; port1 <= hdev->maxchild; ++port1) {
- struct usb_device *udev = hub->port_data[port1 - 1].child;
+ struct usb_device *udev = hdev->children[port1 - 1];
int delta;
if (!udev)
@@ -3331,7 +3330,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
#endif
/* Try to resuscitate an existing device */
- udev = hub->port_data[port1-1].child;
+ udev = hdev->children[port1-1];
if ((portstatus & USB_PORT_STAT_CONNECTION) && udev &&
udev->state != USB_STATE_NOTATTACHED) {
usb_lock_device(udev);
@@ -3360,7 +3359,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
/* Disconnect any existing devices under this port */
if (udev)
- usb_disconnect(&hub->port_data[port1-1].child);
+ usb_disconnect(&hdev->children[port1-1]);
clear_bit(port1, hub->change_bits);
/* We can forget about a "removed" device when there's a physical
@@ -3475,7 +3474,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
&& highspeed_hubs != 0)
check_highspeed (hub, udev, port1);
- /* Store the hub port's child pointer. At this point
+ /* Store the parent's children[] pointer. At this point
* udev becomes globally accessible, although presumably
* no one will look at it until hdev is unlocked.
*/
@@ -3489,7 +3488,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
if (hdev->state == USB_STATE_NOTATTACHED)
status = -ENOTCONN;
else
- hub->port_data[port1-1].child = udev;
+ hdev->children[port1-1] = udev;
spin_unlock_irq(&device_state_lock);
/* Run it through the hoops (find a driver, etc) */
@@ -3497,7 +3496,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
status = usb_new_device(udev);
if (status) {
spin_lock_irq(&device_state_lock);
- hub->port_data[port1-1].child = NULL;
+ hdev->children[port1-1] = NULL;
spin_unlock_irq(&device_state_lock);
}
}
@@ -3543,7 +3542,7 @@ static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
int ret;
hdev = hub->hdev;
- udev = hub->port_data[port - 1].child;
+ udev = hdev->children[port-1];
if (!hub_is_superspeed(hdev)) {
if (!(portchange & USB_PORT_STAT_C_SUSPEND))
return 0;
@@ -3697,7 +3696,7 @@ static void hub_events(void)
*/
if (!(portstatus & USB_PORT_STAT_ENABLE)
&& !connect_change
- && hub->port_data[i-1].child) {
+ && hdev->children[i-1]) {
dev_err (hub_dev,
"port %i "
"disabled by hub (EMI?), "
@@ -4235,15 +4234,3 @@ void usb_queue_reset_device(struct usb_interface *iface)
schedule_work(&iface->reset_ws);
}
EXPORT_SYMBOL_GPL(usb_queue_reset_device);
-
-struct usb_device *usb_get_hub_child_device(struct usb_device *hdev,
- int port1)
-{
- struct usb_hub *hub = hdev_to_hub(hdev);
-
- if (!hub || port1 > hdev->maxchild || port1 < 1)
- return NULL;
- return hub->port_data[port1 - 1].child;
-}
-EXPORT_SYMBOL_GPL(usb_get_hub_child_device);
-