2013/7/27 Rafael J. Wysocki <rjw@xxxxxxx>:
> From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
>
> 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 <rafael.j.wysocki@xxxxxxxxx>
> ---
> drivers/acpi/device_pm.c | 22 ++++++++++------------
> 1 file changed, 10 insertions(+), 12 deletions(-)
>
> Index: linux-pm/drivers/acpi/device_pm.c
> ===================================================================
> --- linux-pm.orig/drivers/acpi/device_pm.c
> +++ linux-pm/drivers/acpi/device_pm.c
> @@ -166,20 +166,20 @@ int acpi_device_set_power(struct acpi_de
> /* 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",
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
Missing "is" or it should be omitted?
> + 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_de
>
> 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_de
>
> 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,
>
> --
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--
Best regards
Tianyu Lan
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