From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guenter Roeck Subject: [PATCH v3 34/47] acpi: Register power-off handler with kernel power-off handler Date: Mon, 27 Oct 2014 08:55:41 -0700 Message-ID: <1414425354-10359-35-git-send-email-linux@roeck-us.net> References: <1414425354-10359-1-git-send-email-linux@roeck-us.net> Return-path: In-Reply-To: <1414425354-10359-1-git-send-email-linux@roeck-us.net> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org, Guenter Roeck , "Rafael J. Wysocki" , Len Brown , linux-acpi@vger.kernel.org List-Id: linux-pm@vger.kernel.org Register with kernel power-off handler instead of setting pm_power_off directly. Register with high priority to reflect that the driver explicitly overrides existing power-off handlers. Cc: Rafael J. Wysocki Cc: Len Brown Signed-off-by: Guenter Roeck --- v3: - Replace poweroff in all newly introduced variables and in text with power_off or power-off as appropriate - Replace POWEROFF_PRIORITY_xxx with POWER_OFF_PRIORITY_xxx - Replace acpi: with ACPI: in log message v2: - Use define to specify poweroff handler priority - Use pr_warn instead of pr_err drivers/acpi/sleep.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 05a31b5..7875b92 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -16,6 +16,8 @@ #include #include #include +#include +#include #include #include #include @@ -827,14 +829,22 @@ static void acpi_power_off_prepare(void) acpi_disable_all_gpes(); } -static void acpi_power_off(void) +static int acpi_power_off(struct notifier_block *this, + unsigned long unused1, void *unused2) { /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ printk(KERN_DEBUG "%s called\n", __func__); local_irq_disable(); acpi_enter_sleep_state(ACPI_STATE_S5); + + return NOTIFY_DONE; } +static struct notifier_block acpi_power_off_nb = { + .notifier_call = acpi_power_off, + .priority = POWER_OFF_PRIORITY_HIGH, +}; + int __init acpi_sleep_init(void) { char supported[ACPI_S_STATE_COUNT * 3 + 1]; @@ -851,7 +861,8 @@ int __init acpi_sleep_init(void) if (acpi_sleep_state_supported(ACPI_STATE_S5)) { sleep_states[ACPI_STATE_S5] = 1; pm_power_off_prepare = acpi_power_off_prepare; - pm_power_off = acpi_power_off; + if (register_power_off_handler(&acpi_power_off_nb)) + pr_warn("ACPI: Failed to register power-off handler\n"); } supported[0] = 0; -- 1.9.1