The patch titled
leds: add possibility to remove leds classdevs during suspend/resume
has been added to the -mm tree. Its filename is
leds-add-possibility-to-remove-leds-classdevs-during-suspend-resume.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: leds: add possibility to remove leds classdevs during suspend/resume
From: Rafael J. Wysocki <rjw@xxxxxxx>
Make it possible to unregister a led classdev object in a safe way during a
suspend/resume cycle.
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
Cc: Michael Buesch <mb@xxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: "John W. Linville" <linville@xxxxxxxxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: Kay Sievers <kay.sievers@xxxxxxxx>
Cc: Richard Purdie <rpurdie@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/leds/led-class.c | 13 +++++++++----
include/linux/leds.h | 10 +++++++++-
2 files changed, 18 insertions(+), 5 deletions(-)
diff -puN drivers/leds/led-class.c~leds-add-possibility-to-remove-leds-classdevs-during-suspend-resume drivers/leds/led-class.c
--- a/drivers/leds/led-class.c~leds-add-possibility-to-remove-leds-classdevs-during-suspend-resume
+++ a/drivers/leds/led-class.c
@@ -137,12 +137,14 @@ err_out:
EXPORT_SYMBOL_GPL(led_classdev_register);
/**
- * led_classdev_unregister - unregisters a object of led_properties class.
+ * __led_classdev_unregister - unregisters a object of led_properties class.
* @led_cdev: the led device to unregister
+ * @suspended: indicates whether system-wide suspend or resume is in progress
*
* Unregisters a previously registered via led_classdev_register object.
*/
-void led_classdev_unregister(struct led_classdev *led_cdev)
+void __led_classdev_unregister(struct led_classdev *led_cdev,
+ bool suspended)
{
device_remove_file(led_cdev->dev, &dev_attr_brightness);
#ifdef CONFIG_LEDS_TRIGGERS
@@ -153,13 +155,16 @@ void led_classdev_unregister(struct led_
up_write(&led_cdev->trigger_lock);
#endif
- device_unregister(led_cdev->dev);
+ if (suspended)
+ device_pm_schedule_removal(led_cdev->dev);
+ else
+ device_unregister(led_cdev->dev);
down_write(&leds_list_lock);
list_del(&led_cdev->node);
up_write(&leds_list_lock);
}
-EXPORT_SYMBOL_GPL(led_classdev_unregister);
+EXPORT_SYMBOL_GPL(__led_classdev_unregister);
static int __init leds_init(void)
{
diff -puN include/linux/leds.h~leds-add-possibility-to-remove-leds-classdevs-during-suspend-resume include/linux/leds.h
--- a/include/linux/leds.h~leds-add-possibility-to-remove-leds-classdevs-during-suspend-resume
+++ a/include/linux/leds.h
@@ -59,7 +59,15 @@ struct led_classdev {
extern int led_classdev_register(struct device *parent,
struct led_classdev *led_cdev);
-extern void led_classdev_unregister(struct led_classdev *led_cdev);
+extern void __led_classdev_unregister(struct led_classdev *led_cdev, bool sus);
+static inline void led_classdev_unregister(struct led_classdev *lcd)
+{
+ __led_classdev_unregister(lcd, false);
+}
+static inline void led_classdev_unregister_suspended(struct led_classdev *lcd)
+{
+ __led_classdev_unregister(lcd, true);
+}
extern void led_classdev_suspend(struct led_classdev *led_cdev);
extern void led_classdev_resume(struct led_classdev *led_cdev);
_
Patches currently in -mm which might be from rjw@xxxxxxx are
origin.patch
git-acpi.patch
cpufreq-revert-get-core-affinity-from-acpi_processor_preregister_performance.patch
gregkh-driver-kset-convert-to-kobj_sysfs_ops-vs-git-acpi.patch
git-x86.patch
git-x86-vs-pm-acquire-device-locks-on-suspend-rev-3.patch
git-xfs.patch
page-allocator-clean-up-pcp-draining-functions.patch
page-allocator-clean-up-pcp-draining-functions-swsusp-fix.patch
page-allocator-clean-up-pcp-draining-functions-swsusp-fix-fix.patch
kernel-power-diskc-make-code-static.patch
make-kernel_shutdown_prepare-static.patch
pm-export-device_pm_schedule_removal.patch
misc-add-possibility-to-remove-misc-devices-during-suspend-resume.patch
hwrng-add-possibility-to-remove-hwrng-devices-during-suspend-resume.patch
leds-add-possibility-to-remove-leds-classdevs-during-suspend-resume.patch
b43-avoid-unregistering-device-objects-during-suspend.patch
proc-fix-the-threaded-proc-self.patch
shrink_slab-handle-bad-shrinkers.patch
-
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