On Wednesday, 7 of November 2007, Daniel Drake wrote:
> The CONFIG_SUSPEND changes in 2.6.23 caused a regression under certain
> configuration conditions (SUSPEND=n, USB_AUTOSUSPEND=y) where all USB device
> attributes in sysfs (idVendor, idProduct, ...) silently disappeared, causing
> udev breakage and more.
>
> The cause of this is that the /sys/.../power subdirectory is now only created
> when CONFIG_PM_SLEEP is set, however, it should be created whenever CONFIG_PM
> is set to handle the above situation. The following patch fixes the
> regression.
>
> Signed-off-by: Daniel Drake <dsd@xxxxxxxxxx>
Acked-by: Rafael J. Wysocki <rjw@xxxxxxx>
Greg, I think this patch should go through your tree?
> Index: linux-2.6.24-rc1-git14/drivers/base/core.c
> ===================================================================
> --- linux-2.6.24-rc1-git14.orig/drivers/base/core.c
> +++ linux-2.6.24-rc1-git14/drivers/base/core.c
> @@ -770,9 +770,10 @@ int device_add(struct device *dev)
> error = device_add_attrs(dev);
> if (error)
> goto AttrsError;
> - error = device_pm_add(dev);
> + error = dpm_sysfs_add(dev);
> if (error)
> goto PMError;
> + device_pm_add(dev);
> error = bus_add_device(dev);
> if (error)
> goto BusError;
> @@ -797,6 +798,7 @@ int device_add(struct device *dev)
> return error;
> BusError:
> device_pm_remove(dev);
> + dpm_sysfs_remove(dev);
> PMError:
> if (dev->bus)
> blocking_notifier_call_chain(&dev->bus->bus_notifier,
> Index: linux-2.6.24-rc1-git14/drivers/base/power/Makefile
> ===================================================================
> --- linux-2.6.24-rc1-git14.orig/drivers/base/power/Makefile
> +++ linux-2.6.24-rc1-git14/drivers/base/power/Makefile
> @@ -1,5 +1,6 @@
> obj-y := shutdown.o
> -obj-$(CONFIG_PM_SLEEP) += main.o sysfs.o
> +obj-$(CONFIG_PM) += sysfs.o
> +obj-$(CONFIG_PM_SLEEP) += main.o
> obj-$(CONFIG_PM_TRACE) += trace.o
>
> ifeq ($(CONFIG_DEBUG_DRIVER),y)
> Index: linux-2.6.24-rc1-git14/drivers/base/power/power.h
> ===================================================================
> --- linux-2.6.24-rc1-git14.orig/drivers/base/power/power.h
> +++ linux-2.6.24-rc1-git14/drivers/base/power/power.h
> @@ -18,9 +18,24 @@ static inline struct device * to_device(
> return container_of(entry, struct device, power.entry);
> }
>
> -extern int device_pm_add(struct device *);
> +extern void device_pm_add(struct device *);
> extern void device_pm_remove(struct device *);
>
> +#else /* CONFIG_PM_SLEEP */
> +
> +
> +static inline void device_pm_add(struct device * dev)
> +{
> +}
> +static inline void device_pm_remove(struct device * dev)
> +{
> +
> +}
> +
> +#endif
> +
> +#ifdef CONFIG_PM
> +
> /*
> * sysfs.c
> */
> @@ -28,16 +43,16 @@ extern void device_pm_remove(struct devi
> extern int dpm_sysfs_add(struct device *);
> extern void dpm_sysfs_remove(struct device *);
>
> -#else /* CONFIG_PM_SLEEP */
> +#else /* CONFIG_PM */
>
> -
> -static inline int device_pm_add(struct device * dev)
> +static inline int dpm_sysfs_add(struct device * dev)
> {
> return 0;
> }
> -static inline void device_pm_remove(struct device * dev)
> +static inline void dpm_sysfs_remove(struct device * dev)
> {
>
> }
>
> -#endif
> +#endif /* CONFIG_PM */
> +
> Index: linux-2.6.24-rc1-git14/drivers/base/power/main.c
> ===================================================================
> --- linux-2.6.24-rc1-git14.orig/drivers/base/power/main.c
> +++ linux-2.6.24-rc1-git14/drivers/base/power/main.c
> @@ -38,20 +38,14 @@ static DEFINE_MUTEX(dpm_list_mtx);
> int (*platform_enable_wakeup)(struct device *dev, int is_on);
>
>
> -int device_pm_add(struct device *dev)
> +void device_pm_add(struct device *dev)
> {
> - int error;
> -
> pr_debug("PM: Adding info for %s:%s\n",
> dev->bus ? dev->bus->name : "No Bus",
> kobject_name(&dev->kobj));
> mutex_lock(&dpm_list_mtx);
> list_add_tail(&dev->power.entry, &dpm_active);
> - error = dpm_sysfs_add(dev);
> - if (error)
> - list_del(&dev->power.entry);
> mutex_unlock(&dpm_list_mtx);
> - return error;
> }
>
> void device_pm_remove(struct device *dev)
>
>
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