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Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/core/driver.c63
-rw-r--r--drivers/usb/core/generic.c14
-rw-r--r--drivers/usb/core/hub.c96
-rw-r--r--drivers/usb/core/usb.h2
4 files changed, 70 insertions, 105 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index b0db1583c52..eefc98584ea 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -783,7 +783,7 @@ static int resume_device(struct usb_device *udev)
return udriver->resume(udev);
}
-/* Caller has locked intf */
+/* Caller has locked intf's usb_device */
static int suspend_interface(struct usb_interface *intf, pm_message_t msg)
{
struct usb_driver *driver;
@@ -815,7 +815,7 @@ static int suspend_interface(struct usb_interface *intf, pm_message_t msg)
return status;
}
-/* Caller has locked intf */
+/* Caller has locked intf's usb_device */
static int resume_interface(struct usb_interface *intf)
{
struct usb_driver *driver;
@@ -856,14 +856,59 @@ static int resume_interface(struct usb_interface *intf)
return 0;
}
+/* Caller has locked udev */
+int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
+{
+ int status = 0;
+ int i = 0;
+ struct usb_interface *intf;
+
+ if (udev->actconfig) {
+ for (; i < udev->actconfig->desc.bNumInterfaces; i++) {
+ intf = udev->actconfig->interface[i];
+ status = suspend_interface(intf, msg);
+ if (status != 0)
+ break;
+ }
+ }
+ if (status == 0)
+ status = suspend_device(udev, msg);
+
+ /* If the suspend failed, resume interfaces that did get suspended */
+ if (status != 0) {
+ while (--i >= 0) {
+ intf = udev->actconfig->interface[i];
+ resume_interface(intf);
+ }
+ }
+ return status;
+}
+
+/* Caller has locked udev */
+int usb_resume_both(struct usb_device *udev)
+{
+ int status;
+ int i;
+ struct usb_interface *intf;
+
+ status = resume_device(udev);
+ if (status == 0 && udev->actconfig) {
+ for (i = 0; i < udev->actconfig->desc.bNumInterfaces; i++) {
+ intf = udev->actconfig->interface[i];
+ resume_interface(intf);
+ }
+ }
+ return status;
+}
+
static int usb_suspend(struct device *dev, pm_message_t message)
{
int status;
if (is_usb_device(dev))
- status = suspend_device(to_usb_device(dev), message);
+ status = usb_suspend_both(to_usb_device(dev), message);
else
- status = suspend_interface(to_usb_interface(dev), message);
+ status = 0;
return status;
}
@@ -871,10 +916,12 @@ static int usb_resume(struct device *dev)
{
int status;
- if (is_usb_device(dev))
- status = resume_device(to_usb_device(dev));
- else
- status = resume_interface(to_usb_interface(dev));
+ if (is_usb_device(dev)) {
+ status = usb_resume_both(to_usb_device(dev));
+
+ /* Rebind drivers that had no suspend method? */
+ } else
+ status = 0;
return status;
}
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c
index 1522195de71..b6dacd7551d 100644
--- a/drivers/usb/core/generic.c
+++ b/drivers/usb/core/generic.c
@@ -184,22 +184,8 @@ static void generic_disconnect(struct usb_device *udev)
#ifdef CONFIG_PM
-static int verify_suspended(struct device *dev, void *unused)
-{
- if (dev->driver == NULL)
- return 0;
- return (dev->power.power_state.event == PM_EVENT_ON) ? -EBUSY : 0;
-}
-
static int generic_suspend(struct usb_device *udev, pm_message_t msg)
{
- int status;
-
- /* rule out bogus requests through sysfs */
- status = device_for_each_child(&udev->dev, NULL, verify_suspended);
- if (status)
- return status;
-
/* USB devices enter SUSPEND state through their hubs, but can be
* marked for FREEZE as soon as their children are already idled.
* But those semantics are useless, so we equate the two (sigh).
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index a372332440b..a39112041e6 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1662,9 +1662,6 @@ static int finish_port_resume(struct usb_device *udev)
"gone after usb resume? status %d\n",
status);
else if (udev->actconfig) {
- unsigned i;
- int (*resume)(struct device *);
-
le16_to_cpus(&devstatus);
if ((devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP))
&& udev->parent) {
@@ -1675,24 +1672,9 @@ static int finish_port_resume(struct usb_device *udev)
USB_DEVICE_REMOTE_WAKEUP, 0,
NULL, 0,
USB_CTRL_SET_TIMEOUT);
- if (status) {
+ if (status)
dev_dbg(&udev->dev, "disable remote "
"wakeup, status %d\n", status);
- status = 0;
- }
- }
-
- /* resume interface drivers; if this is a hub, it
- * may have a child resume event to deal with soon
- */
- resume = udev->dev.bus->resume;
- for (i = 0; i < udev->actconfig->desc.bNumInterfaces; i++) {
- struct device *dev =
- &udev->actconfig->interface[i]->dev;
-
- down(&dev->sem);
- (void) resume(dev);
- up(&dev->sem);
}
status = 0;
@@ -1802,15 +1784,7 @@ int usb_port_resume(struct usb_device *udev)
} else
status = finish_port_resume(udev);
if (status < 0)
- dev_dbg(&udev->dev, "can't resume, status %d\n",
- status);
-
- /* rebind drivers that had no suspend() */
- if (status == 0) {
- usb_unlock_device(udev);
- bus_rescan_devices(&usb_bus_type);
- usb_lock_device(udev);
- }
+ dev_dbg(&udev->dev, "can't resume, status %d\n", status);
return status;
}
@@ -1830,6 +1804,9 @@ static int remote_wakeup(struct usb_device *udev)
msleep(10);
status = finish_port_resume(udev);
}
+
+ if (status == 0)
+ usb_resume_both(udev);
usb_unlock_device(udev);
#endif
return status;
@@ -1901,51 +1878,8 @@ static int hub_resume(struct usb_interface *intf)
}
}
+ /* tell khubd to look for changes on this hub */
hub_activate(hub);
-
- /* REVISIT: this recursion probably shouldn't exist. Remove
- * this code sometime, after retesting with different root and
- * external hubs.
- */
-#ifdef CONFIG_USB_SUSPEND
- {
- unsigned port1;
-
- for (port1 = 1; port1 <= hdev->maxchild; port1++) {
- struct usb_device *udev;
- u16 portstat, portchange;
-
- udev = hdev->children [port1-1];
- status = hub_port_status(hub, port1, &portstat, &portchange);
- if (status == 0) {
- if (portchange & USB_PORT_STAT_C_SUSPEND) {
- clear_port_feature(hdev, port1,
- USB_PORT_FEAT_C_SUSPEND);
- portchange &= ~USB_PORT_STAT_C_SUSPEND;
- }
-
- /* let khubd handle disconnects etc */
- if (portchange)
- continue;
- }
-
- if (!udev || status < 0)
- continue;
- usb_lock_device(udev);
- if (portstat & USB_PORT_STAT_SUSPEND)
- status = hub_port_resume(hub, port1, udev);
- else {
- status = finish_port_resume(udev);
- if (status < 0) {
- dev_dbg(&intf->dev, "resume port %d --> %d\n",
- port1, status);
- hub_port_logical_disconnect(hub, port1);
- }
- }
- usb_unlock_device(udev);
- }
- }
-#endif
return 0;
}
@@ -2602,17 +2536,6 @@ static void hub_events(void)
usb_get_intf(intf);
spin_unlock_irq(&hub_event_lock);
- /* Is this is a root hub wanting to reactivate the downstream
- * ports? If so, be sure the interface resumes even if its
- * stub "device" node was never suspended.
- */
- if (i) {
- dpm_runtime_resume(&hdev->dev);
- dpm_runtime_resume(&intf->dev);
- usb_put_intf(intf);
- continue;
- }
-
/* Lock the device, then check to see if we were
* disconnected while waiting for the lock to succeed. */
if (locktree(hdev) < 0) {
@@ -2629,6 +2552,13 @@ static void hub_events(void)
goto loop;
}
+ /* Is this is a root hub wanting to reactivate the downstream
+ * ports? If so, be sure the interface resumes even if its
+ * stub "device" node was never suspended.
+ */
+ if (i)
+ usb_resume_both(hdev);
+
/* If this is an inactive or suspended hub, do nothing */
if (hub->quiescing)
goto loop;
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 1d25ccac783..cc42972b6bb 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -30,6 +30,8 @@ extern void usb_major_cleanup(void);
extern int usb_host_init(void);
extern void usb_host_cleanup(void);
+extern int usb_suspend_both(struct usb_device *udev, pm_message_t msg);
+extern int usb_resume_both(struct usb_device *udev);
extern int usb_port_suspend(struct usb_device *dev);
extern int usb_port_resume(struct usb_device *dev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 02:48:13 +0000