This patch (as791b) fixes things up to avoid compiler warnings or
errors when CONFIG_USB_SUSPEND or CONFIG_PM isn't set.
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
---
This revises the as791 patch (fix "statement with no effect") submitted
yesterday. It fixes compile problems when either CONFIG_USB_SUSPEND or
CONFIG_PM isn't set. It includes the changes suggested by Andrew and
goes beyond them.
Index: usb-2.6/drivers/usb/core/usb.h
===================================================================
--- usb-2.6.orig/drivers/usb/core/usb.h
+++ usb-2.6/drivers/usb/core/usb.h
@@ -36,6 +36,16 @@ extern int usb_resume_both(struct usb_de
extern int usb_port_suspend(struct usb_device *dev);
extern int usb_port_resume(struct usb_device *dev);
+static inline void usb_pm_lock(struct usb_device *udev)
+{
+ mutex_lock_nested(&udev->pm_mutex, udev->level);
+}
+
+static inline void usb_pm_unlock(struct usb_device *udev)
+{
+ mutex_unlock(&udev->pm_mutex);
+}
+
#else
#define usb_suspend_both(udev, msg) 0
@@ -45,6 +55,8 @@ static inline int usb_resume_both(struct
}
#define usb_port_suspend(dev) 0
#define usb_port_resume(dev) 0
+static inline void usb_pm_lock(struct usb_device *udev) {}
+static inline void usb_pm_unlock(struct usb_device *udev) {}
#endif
@@ -58,7 +70,11 @@ extern int usb_autoresume_device(struct
#else
#define usb_autosuspend_device(udev, dec_busy_cnt) do {} while (0)
-#define usb_autoresume_device(udev, inc_busy_cnt) 0
+static inline int usb_autoresume_device(struct usb_device *udev,
+ int inc_busy_cnt)
+{
+ return 0;
+}
#endif
Index: usb-2.6/drivers/usb/core/hub.c
===================================================================
--- usb-2.6.orig/drivers/usb/core/hub.c
+++ usb-2.6/drivers/usb/core/hub.c
@@ -1814,7 +1814,7 @@ static int remote_wakeup(struct usb_devi
* to the parent hub! */
usb_lock_device(udev);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
if (udev->state == USB_STATE_SUSPENDED) {
dev_dbg(&udev->dev, "usb %sresume\n", "wakeup-");
/* TRSMRCY = 10 msec */
@@ -1823,7 +1823,7 @@ static int remote_wakeup(struct usb_devi
if (status == 0)
udev->dev.power.power_state.event = PM_EVENT_ON;
}
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
if (status == 0)
usb_autoresume_device(udev, 0);
Index: usb-2.6/include/linux/usb.h
===================================================================
--- usb-2.6.orig/include/linux/usb.h
+++ usb-2.6/include/linux/usb.h
@@ -381,10 +381,10 @@ struct usb_device {
int maxchild; /* Number of ports if hub */
struct usb_device *children[USB_MAXCHILDREN];
+ int pm_usage_cnt; /* usage counter for autosuspend */
#ifdef CONFIG_PM
struct work_struct autosuspend; /* for delayed autosuspends */
struct mutex pm_mutex; /* protects PM operations */
- int pm_usage_cnt; /* usage counter for autosuspend */
unsigned auto_pm:1; /* autosuspend/resume in progress */
unsigned do_remote_wakeup:1; /* remote wakeup should be enabled */
Index: usb-2.6/drivers/usb/core/driver.c
===================================================================
--- usb-2.6.orig/drivers/usb/core/driver.c
+++ usb-2.6/drivers/usb/core/driver.c
@@ -304,11 +304,11 @@ int usb_driver_claim_interface(struct us
dev->driver = &driver->drvwrap.driver;
usb_set_intfdata(iface, priv);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
iface->condition = USB_INTERFACE_BOUND;
mark_active(iface);
iface->pm_usage_cnt = !(driver->supports_autosuspend);
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
/* if interface was already added, bind now; else let
* the future device_add() bind it, bypassing probe()
@@ -357,11 +357,11 @@ void usb_driver_release_interface(struct
dev->driver = NULL;
usb_set_intfdata(iface, NULL);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
iface->condition = USB_INTERFACE_UNBOUND;
mark_quiesced(iface);
iface->needs_remote_wakeup = 0;
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
}
EXPORT_SYMBOL(usb_driver_release_interface);
@@ -792,7 +792,7 @@ EXPORT_SYMBOL_GPL_FUTURE(usb_deregister)
#ifdef CONFIG_PM
-/* Caller has locked udev->pm_mutex */
+/* Caller has locked udev's pm_mutex */
static int suspend_device(struct usb_device *udev, pm_message_t msg)
{
struct usb_device_driver *udriver;
@@ -819,7 +819,7 @@ done:
return status;
}
-/* Caller has locked udev->pm_mutex */
+/* Caller has locked udev's pm_mutex */
static int resume_device(struct usb_device *udev)
{
struct usb_device_driver *udriver;
@@ -845,7 +845,7 @@ done:
return status;
}
-/* Caller has locked intf's usb_device's pm_mutex */
+/* Caller has locked intf's usb_device's pm mutex */
static int suspend_interface(struct usb_interface *intf, pm_message_t msg)
{
struct usb_driver *driver;
@@ -1067,7 +1067,7 @@ int usb_resume_both(struct usb_device *u
/* Propagate the resume up the tree, if necessary */
if (udev->state == USB_STATE_SUSPENDED) {
if (parent) {
- mutex_lock_nested(&parent->pm_mutex, parent->level);
+ usb_pm_lock(parent);
parent->auto_pm = 1;
status = usb_resume_both(parent);
} else {
@@ -1082,7 +1082,7 @@ int usb_resume_both(struct usb_device *u
if (status == 0)
status = resume_device(udev);
if (parent)
- mutex_unlock(&parent->pm_mutex);
+ usb_pm_unlock(parent);
} else {
/* Needed only for setting udev->dev.power.power_state.event
@@ -1132,12 +1132,12 @@ int usb_resume_both(struct usb_device *u
*/
void usb_autosuspend_device(struct usb_device *udev, int dec_usage_cnt)
{
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
udev->pm_usage_cnt -= dec_usage_cnt;
if (udev->pm_usage_cnt <= 0)
schedule_delayed_work(&udev->autosuspend,
USB_AUTOSUSPEND_DELAY);
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
// dev_dbg(&udev->dev, "%s: cnt %d\n",
// __FUNCTION__, udev->pm_usage_cnt);
}
@@ -1171,13 +1171,13 @@ int usb_autoresume_device(struct usb_dev
{
int status;
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
udev->pm_usage_cnt += inc_usage_cnt;
udev->auto_pm = 1;
status = usb_resume_both(udev);
if (status != 0)
udev->pm_usage_cnt -= inc_usage_cnt;
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
// dev_dbg(&udev->dev, "%s: status %d cnt %d\n",
// __FUNCTION__, status, udev->pm_usage_cnt);
return status;
@@ -1218,13 +1218,13 @@ void usb_autopm_put_interface(struct usb
{
struct usb_device *udev = interface_to_usbdev(intf);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
if (intf->condition != USB_INTERFACE_UNBOUND) {
if (--intf->pm_usage_cnt <= 0)
schedule_delayed_work(&udev->autosuspend,
USB_AUTOSUSPEND_DELAY);
}
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
// dev_dbg(&intf->dev, "%s: cnt %d\n",
// __FUNCTION__, intf->pm_usage_cnt);
}
@@ -1266,7 +1266,7 @@ int usb_autopm_get_interface(struct usb_
struct usb_device *udev = interface_to_usbdev(intf);
int status;
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
if (intf->condition == USB_INTERFACE_UNBOUND)
status = -ENODEV;
else {
@@ -1276,7 +1276,7 @@ int usb_autopm_get_interface(struct usb_
if (status != 0)
--intf->pm_usage_cnt;
}
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
// dev_dbg(&intf->dev, "%s: status %d cnt %d\n",
// __FUNCTION__, status, intf->pm_usage_cnt);
return status;
@@ -1292,10 +1292,10 @@ static int usb_suspend(struct device *de
if (is_usb_device(dev)) {
struct usb_device *udev = to_usb_device(dev);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
udev->auto_pm = 0;
status = usb_suspend_both(udev, message);
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
} else
status = 0;
return status;
@@ -1308,10 +1308,10 @@ static int usb_resume(struct device *dev
if (is_usb_device(dev)) {
struct usb_device *udev = to_usb_device(dev);
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
udev->auto_pm = 0;
status = usb_resume_both(udev);
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
/* Rebind drivers that had no suspend method? */
} else
Index: usb-2.6/drivers/usb/core/usb.c
===================================================================
--- usb-2.6.orig/drivers/usb/core/usb.c
+++ usb-2.6/drivers/usb/core/usb.c
@@ -189,10 +189,10 @@ static void usb_autosuspend_work(void *_
{
struct usb_device *udev = _udev;
- mutex_lock_nested(&udev->pm_mutex, udev->level);
+ usb_pm_lock(udev);
udev->auto_pm = 1;
usb_suspend_both(udev, PMSG_SUSPEND);
- mutex_unlock(&udev->pm_mutex);
+ usb_pm_unlock(udev);
}
#endif
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