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Date: Wed, 26 Feb 2014 10:46:37 +0800 From: "Li, Aubrey" <aubrey.li@...ux.intel.com> To: linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org, Len.Brown@...el.com, rjw@...ysocki.net, "alan@...ux.intel.com" <alan@...ux.intel.com>, "Raj, Ashok" <ashok.raj@...el.com> Subject: [PATCH] ACPI/Sleep: pm_power_off need more sanity check to be installed Sleep control and status registers need santity check before ACPI install acpi_power_off to pm_power_off hook. The checking code in acpi_enter_sleep_state() is too late, we should not allow a not-working pm_power_off function hooked. Signed-off-by: Aubrey Li <aubrey.li@...el.com> --- drivers/acpi/sleep.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index b718806..0284d22 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -809,8 +809,11 @@ int __init acpi_sleep_init(void) status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); if (ACPI_SUCCESS(status)) { sleep_states[ACPI_STATE_S5] = 1; - pm_power_off_prepare = acpi_power_off_prepare; - pm_power_off = acpi_power_off; + if (acpi_gbl_FADT.sleep_control.address && + acpi_gbl_FADT.sleep_status.address) { + pm_power_off_prepare = acpi_power_off_prepare; + pm_power_off = acpi_power_off; + } } supported[0] = 0; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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