On Monday, July 29, 2013 10:29:36 AM Aaron Lu wrote:
> On 07/27/2013 09:11 PM, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
> >
> > 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.wyso...@intel.com>
> > ---
> > 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");
>
> I think the state information would also be useful here:
>
> dev_warn(&device->dev, "Cannot transition to a higher-powereed "
> "state %d than paeren's state %d\n", state,
> device->parent->power.state);
This is not the scope of this patch, please send another one on top of it.
Thanks,
Rafael
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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