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[PATCH] usb suspend updates (interface suspend)

Browse source 
This is the first of a few installments of PM API updates to match the
recent switch to "pm_message_t".  This installment primarily affects
USB device drivers (for USB interfaces), and it changes the handful of
drivers which currently implement suspend methods:

    - <linux/usb.h> and usbcore, signature change

    - Some drivers only changed the signature, net effect this just
      shuts up "sparse -Wbitwise":
	* hid-core
	* stir4200

    - Two network drivers did that, and also grew slightly more
      featureful suspend code ... they now properly shut down
      their activities.  (As should stir4200...)
	* pegasus
	* usbnet

Note that the Wake-On-Lan (WOL) support in pegasus doesn't yet work; looks
to me like it's missing a request to turn it on, vs just configuring it.
The ASIX code in usbnet also has WOL hooks that are ready to use; untested.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Index: gregkh-2.6/drivers/net/irda/stir4200.c
===================================================================
This commit is contained in:
David Brownell 2005-04-18 17:39:22 -07:00 committed by Greg K-H
parent c6053ecffb
commit 27d72e8572
7 changed files with 42 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/net/irda/stir4200.c
View file

@ -1128,8 +1128,8 @@ static void stir_disconnect(struct usb_interface *intf)
}
#ifdef CONFIG_PM
/* Power management suspend, so power off the transmitter/receiver */
static int stir_suspend(struct usb_interface *intf, u32 state)
/* USB suspend, so power off the transmitter/receiver */
static int stir_suspend(struct usb_interface *intf, pm_message_t message)
{
struct stir_cb *stir = usb_get_intfdata(intf);

4
drivers/usb/core/hub.c
View file

@ -1731,7 +1731,7 @@ static int finish_port_resume(struct usb_device *udev)
struct usb_driver *driver;
intf = udev->actconfig->interface[i];
if (intf->dev.power.power_state == PM_SUSPEND_ON)
if (intf->dev.power.power_state == PMSG_SUSPEND)
continue;
if (!intf->dev.driver) {
/* FIXME maybe force to alt 0 */
@ -1745,7 +1745,7 @@ static int finish_port_resume(struct usb_device *udev)
/* can we do better than just logging errors? */
status = driver->resume(intf);
if (intf->dev.power.power_state != PM_SUSPEND_ON
if (intf->dev.power.power_state != PMSG_ON
|| status)
dev_dbg(&intf->dev,
"resume fail, state %d code %d\n",

6
drivers/usb/core/usb.c
View file

@ -1382,13 +1382,13 @@ void usb_buffer_unmap_sg (struct usb_device *dev, unsigned pipe,
usb_pipein (pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
}
static int usb_generic_suspend(struct device *dev, u32 state)
static int usb_generic_suspend(struct device *dev, pm_message_t message)
{
struct usb_interface *intf;
struct usb_driver *driver;
if (dev->driver == &usb_generic_driver)
return usb_suspend_device (to_usb_device(dev), state);
return usb_suspend_device (to_usb_device(dev), message);
if ((dev->driver == NULL) ||
(dev->driver_data == &usb_generic_driver_data))
@ -1402,7 +1402,7 @@ static int usb_generic_suspend(struct device *dev, u32 state)
return 0;
if (driver->suspend)
return driver->suspend(intf, state);
return driver->suspend(intf, message);
return 0;
}

6
drivers/usb/input/hid-core.c
View file

@ -1790,12 +1790,12 @@ static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
return 0;
}
static int hid_suspend(struct usb_interface *intf, u32 state)
static int hid_suspend(struct usb_interface *intf, pm_message_t message)
{
struct hid_device *hid = usb_get_intfdata (intf);
usb_kill_urb(hid->urbin);
intf->dev.power.power_state = state;
intf->dev.power.power_state = PMSG_SUSPEND;
dev_dbg(&intf->dev, "suspend\n");
return 0;
}
@ -1805,7 +1805,7 @@ static int hid_resume(struct usb_interface *intf)
struct hid_device *hid = usb_get_intfdata (intf);
int status;
intf->dev.power.power_state = PM_SUSPEND_ON;
intf->dev.power.power_state = PMSG_ON;
if (hid->open)
status = usb_submit_urb(hid->urbin, GFP_NOIO);
else

22
drivers/usb/net/pegasus.c
View file

@ -1364,11 +1364,18 @@ static void pegasus_disconnect(struct usb_interface *intf)
free_netdev(pegasus->net);
}
static int pegasus_suspend (struct usb_interface *intf, pm_message_t state)
static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
{
struct pegasus *pegasus = usb_get_intfdata(intf);
netif_device_detach (pegasus->net);
if (netif_running(pegasus->net)) {
cancel_delayed_work(&pegasus->carrier_check);
usb_kill_urb(pegasus->rx_urb);
usb_kill_urb(pegasus->intr_urb);
}
intf->dev.power.power_state = PMSG_SUSPEND;
return 0;
}
@ -1376,7 +1383,20 @@ static int pegasus_resume (struct usb_interface *intf)
{
struct pegasus *pegasus = usb_get_intfdata(intf);
intf->dev.power.power_state = PMSG_ON;
netif_device_attach (pegasus->net);
if (netif_running(pegasus->net)) {
pegasus->rx_urb->status = 0;
pegasus->rx_urb->actual_length = 0;
read_bulk_callback(pegasus->rx_urb, 0);
pegasus->intr_urb->status = 0;
pegasus->intr_urb->actual_length = 0;
intr_callback(pegasus->intr_urb, 0);
queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
CARRIER_CHECK_DELAY);
}
return 0;
}

10
drivers/usb/net/usbnet.c
View file

@ -3732,11 +3732,17 @@ out:
#ifdef CONFIG_PM
static int usbnet_suspend (struct usb_interface *intf, u32 state)
static int usbnet_suspend (struct usb_interface *intf, pm_message_t message)
{
struct usbnet *dev = usb_get_intfdata(intf);
/* accelerate emptying of the rx and queues, to avoid
* having everything error out.
*/
netif_device_detach (dev->net);
(void) unlink_urbs (dev, &dev->rxq);
(void) unlink_urbs (dev, &dev->txq);
intf->dev.power.power_state = PMSG_SUSPEND;
return 0;
}
@ -3744,7 +3750,9 @@ static int usbnet_resume (struct usb_interface *intf)
{
struct usbnet *dev = usb_get_intfdata(intf);
intf->dev.power.power_state = PMSG_ON;
netif_device_attach (dev->net);
tasklet_schedule (&dev->bh);
return 0;
}

4
include/linux/usb.h
View file

@ -558,7 +558,7 @@ struct usb_driver {
int (*ioctl) (struct usb_interface *intf, unsigned int code, void *buf);
int (*suspend) (struct usb_interface *intf, u32 state);
int (*suspend) (struct usb_interface *intf, pm_message_t message);
int (*resume) (struct usb_interface *intf);
const struct usb_device_id *id_table;
@ -977,7 +977,7 @@ extern int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe,
int timeout);
/* selective suspend/resume */
extern int usb_suspend_device(struct usb_device *dev, u32 state);
extern int usb_suspend_device(struct usb_device *dev, pm_message_t message);
extern int usb_resume_device(struct usb_device *dev);