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Date: Fri, 16 Jun 2017 06:40:56 +0200 From: Michał Kępień <kernel@...pniu.pl> To: Jonathan Woithe <jwoithe@...t42.net>, Darren Hart <dvhart@...radead.org>, Andy Shevchenko <andy@...radead.org> Cc: platform-driver-x86@...r.kernel.org, linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH 5/7] platform/x86: fujitsu-laptop: do not update ACPI device power status Calling acpi_bus_update_power() for ACPI devices FUJ02B1 and FUJ02E3 is pointless as they are not power manageable (neither _PS0 nor _PR0 is defined for any of them), which causes their power state to be inherited from their parent devices. Given the ACPI paths of these two devices (\_SB.PCI0.LPCB.FJEX, \_SB.FEXT), their parent devices are also not power manageable. These parent devices will thus have their power state initialized to ACPI_STATE_D0, which in turn causes the power state for both FUJ02B1 and FUJ02E3 to always be ACPI_STATE_D0 ("on"). Remove relevant acpi_bus_update_power() calls along with parts of debug messages that they were supposed to have an effect on. Signed-off-by: Michał Kępień <kernel@...pniu.pl> --- drivers/platform/x86/fujitsu-laptop.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c index 5c0dc2126313..b9f3ede4d567 100644 --- a/drivers/platform/x86/fujitsu-laptop.c +++ b/drivers/platform/x86/fujitsu-laptop.c @@ -400,7 +400,6 @@ static int fujitsu_backlight_register(struct acpi_device *device) static int acpi_fujitsu_bl_add(struct acpi_device *device) { struct fujitsu_bl *priv; - int state = 0; int error; if (acpi_video_get_backlight_type() != acpi_backlight_vendor) @@ -419,15 +418,8 @@ static int acpi_fujitsu_bl_add(struct acpi_device *device) if (error) return error; - error = acpi_bus_update_power(device->handle, &state); - if (error) { - pr_err("Error reading power state\n"); - return error; - } - - pr_info("ACPI: %s [%s] (%s)\n", - acpi_device_name(device), acpi_device_bid(device), - !device->power.state ? "on" : "off"); + pr_info("ACPI: %s [%s]\n", + acpi_device_name(device), acpi_device_bid(device)); if (acpi_has_method(device->handle, METHOD_NAME__INI)) { vdbg_printk(FUJLAPTOP_DBG_INFO, "Invoking _INI\n"); @@ -788,7 +780,6 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device) static int acpi_fujitsu_laptop_add(struct acpi_device *device) { struct fujitsu_laptop *priv; - int state = 0; int error; int i; @@ -807,15 +798,8 @@ static int acpi_fujitsu_laptop_add(struct acpi_device *device) if (error) return error; - error = acpi_bus_update_power(device->handle, &state); - if (error) { - pr_err("Error reading power state\n"); - return error; - } - - pr_info("ACPI: %s [%s] (%s)\n", - acpi_device_name(device), acpi_device_bid(device), - !device->power.state ? "on" : "off"); + pr_info("ACPI: %s [%s]\n", + acpi_device_name(device), acpi_device_bid(device)); if (acpi_has_method(device->handle, METHOD_NAME__INI)) { vdbg_printk(FUJLAPTOP_DBG_INFO, "Invoking _INI\n"); -- 2.13.1
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