[2/3] ACPI / PM: Make messages in acpi_device_set_power() print device names

On Monday, July 29, 2013 04:16:31 PM Sergei Shtylyov wrote:
> Hello.
> 
> On 29-07-2013 16:17, Rafael J. Wysocki wrote:
> 
> [...]
> 
> >>>> @@ -166,20 +166,20 @@ int acpi_device_set_power(struct acpi_de
> >> []
> >>>>          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");
> 
> >> coalesce format please.
> 
> > I can, but then it'll cross the 80 columns boundary.
> 
>    It's not a problem with checkpatch.pl anymore. Contrariwise, it whines 
> about the broken up string literals, AFAIR.

Oh, at last.

Updated patch follows.

Thanks,
Rafael


---
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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 <rafael.j.wysocki@intel.com>
---
 drivers/acpi/device_pm.c |   22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)


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On 07/29/2013 09:36 PM, Rafael J. Wysocki wrote:
> On Monday, July 29, 2013 04:16:31 PM Sergei Shtylyov wrote:
>> Hello.
>>
>> On 29-07-2013 16:17, Rafael J. Wysocki wrote:
>>
>> [...]
>>
>>>>>> @@ -166,20 +166,20 @@ int acpi_device_set_power(struct acpi_de
>>>> []
>>>>>>          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");
>>
>>>> coalesce format please.
>>
>>> I can, but then it'll cross the 80 columns boundary.
>>
>>    It's not a problem with checkpatch.pl anymore. Contrariwise, it whines 
>> about the broken up string literals, AFAIR.
> 
> Oh, at last.
> 
> Updated patch follows.
> 
> Thanks,
> Rafael
> 
> 
> ---
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> 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.

This makes the log much more informative, thanks!

> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Reviewed-by: Aaron Lu <aaron.lu@intel.com>

And I'll add the state information in another patch on top of this one
later.

-Aaron

> ---
>  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",
> +				  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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