From 2c7d132a589077b31493b3ea82ac83b1f72c93e1 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 30 Jul 2013 14:34:00 +0200 Subject: ACPI / PM: Only set power states of devices that are power manageable Make acpi_device_set_power() check if the given device is power manageable before checking if the given power state is valid for that device. Otherwise it will print that "Device does not support" that power state into the kernel log, which may not make sense for some power states (D0 and D3cold are supported by all devices by definition). Tested-by: Yinghai Lu Signed-off-by: Rafael J. Wysocki --- drivers/acpi/device_pm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/acpi/device_pm.c') diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index 4ab807dc851..63324b87363 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -159,7 +159,8 @@ int acpi_device_set_power(struct acpi_device *device, int state) int result = 0; bool cut_power = false; - if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD)) + if (!device || !device->flags.power_manageable + || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD)) return -EINVAL; /* Make sure this is a valid target state */ -- cgit v1.2.3-70-g09d2 From b69137a74b7a9451b3da504d1ef9ead7cb393922 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 30 Jul 2013 14:34:55 +0200 Subject: ACPI / PM: Make messages in acpi_device_set_power() print device names Modify acpi_device_set_power() so that diagnostic messages printed by it to the kernel log always contain the name of the device concerned to make it possible to identify the device that triggered the message if need be. Also replace printk(KERN_WARNING ) with dev_warn() everywhere in that function. Signed-off-by: Rafael J. Wysocki Reviewed-by: Aaron Lu --- drivers/acpi/device_pm.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) (limited to 'drivers/acpi/device_pm.c') diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index 63324b87363..8234e1f8c79 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -166,20 +166,20 @@ int acpi_device_set_power(struct acpi_device *device, int state) /* Make sure this is a valid target state */ if (state == device->power.state) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at %s\n", + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] already in %s\n", + device->pnp.bus_id, acpi_power_state_string(state))); return 0; } if (!device->power.states[state].flags.valid) { - printk(KERN_WARNING PREFIX "Device does not support %s\n", - acpi_power_state_string(state)); + dev_warn(&device->dev, "Power state %s not supported\n", + acpi_power_state_string(state)); return -ENODEV; } if (device->parent && (state < device->parent->power.state)) { - printk(KERN_WARNING PREFIX - "Cannot set device to a higher-powered" - " state than parent\n"); + dev_warn(&device->dev, + "Cannot transition to a higher-powered state than parent\n"); return -ENODEV; } @@ -192,8 +192,8 @@ int acpi_device_set_power(struct acpi_device *device, int state) if (state < device->power.state && state != ACPI_STATE_D0 && device->power.state >= ACPI_STATE_D3_HOT) { - printk(KERN_WARNING PREFIX - "Cannot transition to non-D0 state from D3\n"); + dev_warn(&device->dev, + "Cannot transition to non-D0 state from D3\n"); return -ENODEV; } @@ -220,10 +220,8 @@ int acpi_device_set_power(struct acpi_device *device, int state) end: if (result) { - printk(KERN_WARNING PREFIX - "Device [%s] failed to transition to %s\n", - device->pnp.bus_id, - acpi_power_state_string(state)); + dev_warn(&device->dev, "Failed to change power state to %s\n", + acpi_power_state_string(state)); } else { device->power.state = state; ACPI_DEBUG_PRINT((ACPI_DB_INFO, -- cgit v1.2.3-70-g09d2 From 7b4e0c4ac1809eab6fcfe6818ec8b70be79b41bc Mon Sep 17 00:00:00 2001 From: Aaron Lu Date: Wed, 31 Jul 2013 14:07:15 +0200 Subject: ACPI / PM: Remove redundant power manageable check from acpi_bus_set_power() Now that acpi_device_set_power() checks whether or not the given device is power manageable, it is not necessary to do this check in acpi_bus_set_power() any more, so remove it. Signed-off-by: Aaron Lu Signed-off-by: Rafael J. Wysocki --- drivers/acpi/device_pm.c | 7 ------- 1 file changed, 7 deletions(-) (limited to 'drivers/acpi/device_pm.c') diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index 8234e1f8c79..beb9625e845 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -243,13 +243,6 @@ int acpi_bus_set_power(acpi_handle handle, int state) if (result) return result; - if (!device->flags.power_manageable) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Device [%s] is not power manageable\n", - dev_name(&device->dev))); - return -ENODEV; - } - return acpi_device_set_power(device, state); } EXPORT_SYMBOL(acpi_bus_set_power); -- cgit v1.2.3-70-g09d2 From 593298e68a3a53bd2fe942244250dfef4d68d477 Mon Sep 17 00:00:00 2001 From: Aaron Lu Date: Sat, 3 Aug 2013 21:13:22 +0200 Subject: ACPI / PM: Add state information to error message in acpi_device_set_power() The state information can be useful to know what the problem is when an error message about a device can not being set to a higher power state than its parent appeared, so this patch adds such state information for both the target state of the device and the current state of its parent. Signed-off-by: Aaron Lu Signed-off-by: Rafael J. Wysocki --- drivers/acpi/device_pm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/acpi/device_pm.c') diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index beb9625e845..59d3202f6b3 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -179,7 +179,9 @@ int acpi_device_set_power(struct acpi_device *device, int state) } if (device->parent && (state < device->parent->power.state)) { dev_warn(&device->dev, - "Cannot transition to a higher-powered state than parent\n"); + "Cannot transition to power state %s for parent in %s\n", + acpi_power_state_string(state), + acpi_power_state_string(device->parent->power.state)); return -ENODEV; } -- cgit v1.2.3-70-g09d2