Re: [patch] IDE driver model update

[Alexander Viro]

On Mon, 7 Oct 2002, Patrick Mochel wrote:

> > On Mon, 7 Oct 2002, Patrick Mochel wrote:
> > 
> > > --- a/drivers/ide/ide-probe.c	Mon Oct  7 12:19:11 2002
> > > +++ b/drivers/ide/ide-probe.c	Mon Oct  7 12:19:11 2002
> > > @@ -952,6 +952,15 @@
> > >  
> > >  EXPORT_SYMBOL(init_irq);
> > >  
> > > +static void ide_device_release(struct device * dev)
> > > +{
> > > +	ide_drive_t * drive = dev->driver_data;
> > > +	ide_driver_t * driver = drive->driver;
> > > +
> > > +	if (driver && driver->cleanup)
> > > +		driver->cleanup(drive);
> > > +}
> > > +
> > >  /*
> > >   * init_gendisk() (as opposed to ide_geninit) is called for each major device,
> > >   * after probing for drives, to allocate partition tables and other data
> > > @@ -986,6 +995,8 @@
> > >  			 "%s","IDE Drive");
> > >  		disk->disk_dev.parent = &hwif->gendev;
> > >  		disk->disk_dev.bus = &ide_bus_type;
> > > +		disk->disk_dev.driver_data = &hwif->drives[unit];
> > > +		disk->disk_dev.release = ide_device_release;
> > 
> > That is Wrong(tm).  Logics around ->cleanup() doesn't belong to driverfs.
> > As far as IDE code is concerned, any outside calls of ->cleanup() are
> > illegal.  What are you trying to achieve with that?
> 
> It's the desctrutor for the device object. ->release() is the last thing 
> called when the last reference to the device goes away. That's the only 
> time it's called. 

???

Details, please.  When can it happen and what normally holds that object
pinned?