Messages in this thread Patch in this message |  | | From | Guenter Roeck <> | Subject | [PATCH v2 30/47] x86: iris: Register with kernel poweroff handler | Date | Mon, 20 Oct 2014 21:12:46 -0700 |
| |
Register with kernel poweroff handler instead of setting pm_power_off directly. Register with high priority to reflect that the original code overwrites existing poweroff handlers.
Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> --- v2: - Use define to specify poweroff handler priority - Use devm_register_power_off_handler
arch/x86/platform/iris/iris.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-)
diff --git a/arch/x86/platform/iris/iris.c b/arch/x86/platform/iris/iris.c index 4d171e8..dd36815 100644 --- a/arch/x86/platform/iris/iris.c +++ b/arch/x86/platform/iris/iris.c @@ -23,6 +23,7 @@ #include <linux/moduleparam.h> #include <linux/module.h> +#include <linux/notifier.h> #include <linux/platform_device.h> #include <linux/kernel.h> #include <linux/errno.h> @@ -47,15 +48,21 @@ static bool force; module_param(force, bool, 0); MODULE_PARM_DESC(force, "Set to one to force poweroff handler installation."); -static void (*old_pm_power_off)(void); - -static void iris_power_off(void) +static int iris_power_off(struct notifier_block *this, unsigned long unused1, + void *unused2) { outb(IRIS_GIO_PULSE, IRIS_GIO_OUTPUT); msleep(850); outb(IRIS_GIO_REST, IRIS_GIO_OUTPUT); + + return NOTIFY_DONE; } +static struct notifier_block iris_poweroff_nb = { + .notifier_call = iris_power_off, + .priority = POWEROFF_PRIORITY_HIGH, +}; + /* * Before installing the power_off handler, try to make sure the OS is * running on an Iris. Since Iris does not support DMI, this is done @@ -65,20 +72,25 @@ static void iris_power_off(void) static int iris_probe(struct platform_device *pdev) { unsigned char status = inb(IRIS_GIO_INPUT); + int ret; + if (status == IRIS_GIO_NODEV) { printk(KERN_ERR "This machine does not seem to be an Iris. " "Power off handler not installed.\n"); return -ENODEV; } - old_pm_power_off = pm_power_off; - pm_power_off = &iris_power_off; + + ret = devm_register_power_off_handler(&pdev->dev, &iris_poweroff_nb); + if (ret) { + dev_err(&pdev->dev, "Failed to register poweroff handler\n"); + return ret; + } printk(KERN_INFO "Iris power_off handler installed.\n"); return 0; } static int iris_remove(struct platform_device *pdev) { - pm_power_off = old_pm_power_off; printk(KERN_INFO "Iris power_off handler uninstalled.\n"); return 0; } -- 1.9.1
|  |