Re: [PATCH v2] ACPI: Add ACPI CPU hot-remove support

[Toshi Kani <toshi.kani@hp.com>]

Hi Len,

This patch has been waiting for your review for 4 months. (v2 simply
rebased.)  Is there any thing I need to do?

Thanks,
-Toshi

On Tue, 2012-10-09 at 07:43 -0600, Toshi Kani wrote:
> Hi Len,
> 
> Can you please review this patch?  Please let me know if there is
> anything I need to do for 3.7.
> 
> Thanks,
> -Toshi
> 
> 
> On Fri, 2012-08-24 at 14:54 -0600, Toshi Kani wrote:
> > Added CPU hot-remove support through an ACPI eject notification.
> > It calls acpi_bus_hot_remove_device(), which shares the same code
> > path with the sysfs eject operation.  acpi_os_hotplug_execute()
> > serializes hot-remove operations between ACPI hot-remove and sysfs
> > eject requests.
> > 
> > v2:
> >  - Rebased to 3.6-rc3.
> > 
> > Signed-off-by: Toshi Kani <toshi.kani@hp.com>
> > Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
> > Tested-by: IgorMammedov <imammedo@redhat.com>
> > Tested-by: Vijay Mohan Pandarathil <vijaymohan.pandarathil@hp.com>
> > Tested-by: Prarit Bhargava <prarit@redhat.com>
> > ---
> >  drivers/acpi/processor_driver.c |   27 +++++++++++++++++----------
> >  1 files changed, 17 insertions(+), 10 deletions(-)
> > 
> > diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
> > index bfc31cb..d12e9c3 100644
> > --- a/drivers/acpi/processor_driver.c
> > +++ b/drivers/acpi/processor_driver.c
> > @@ -694,8 +694,8 @@ int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device)
> >  static void acpi_processor_hotplug_notify(acpi_handle handle,
> >  					  u32 event, void *data)
> >  {
> > -	struct acpi_processor *pr;
> >  	struct acpi_device *device = NULL;
> > +	struct acpi_eject_event *ej_event = NULL;
> >  	u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
> >  	int result;
> >  
> > @@ -727,20 +727,27 @@ static void acpi_processor_hotplug_notify(acpi_handle handle,
> >  				  "received ACPI_NOTIFY_EJECT_REQUEST\n"));
> >  
> >  		if (acpi_bus_get_device(handle, &device)) {
> > -			printk(KERN_ERR PREFIX
> > -				    "Device don't exist, dropping EJECT\n");
> > +			pr_err(PREFIX "Device don't exist, dropping EJECT\n");
> >  			break;
> >  		}
> > -		pr = acpi_driver_data(device);
> > -		if (!pr) {
> > -			printk(KERN_ERR PREFIX
> > -				    "Driver data is NULL, dropping EJECT\n");
> > +		if (!acpi_driver_data(device)) {
> > +			pr_err(PREFIX "Driver data is NULL, dropping EJECT\n");
> >  			break;
> >  		}
> >  
> > -		/* REVISIT: update when eject is supported */
> > -		ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
> > -		break;
> > +		ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL);
> > +		if (!ej_event) {
> > +			pr_err(PREFIX "No memory, dropping EJECT\n");
> > +			break;
> > +		}
> > +
> > +		ej_event->handle = handle;
> > +		ej_event->event = ACPI_NOTIFY_EJECT_REQUEST;
> > +		acpi_os_hotplug_execute(acpi_bus_hot_remove_device,
> > +					(void *)ej_event);
> > +
> > +		/* eject is performed asynchronously */
> > +		return;
> >  
> >  	default:
> >  		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
> 
> 
> --
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