Re: libata-dev queue updated

[Adrian Bunk <bunk@stusta.de>]

On Fri, Aug 26, 2005 at 09:04:37AM +0900, Tomita, Haruo wrote:
> On  Thursday, August 25, 2005 8:02 PM (JST), Adrian Bunk wrote:
> 
> > > 2.6.13- rc7-libata1.patch.bz2 was used. 
> > > A combined mode of ata_piix seems not to work. 
> > > Is the following patches correct?
> > > 
> > > diff -urN linux-2.6.13-rc7.orig/drivers/scsi/Kconfig 
> > linux-2.6.13-rc7/drivers/scsi/Kconfig
> > > --- linux-2.6.13-rc7.orig/drivers/scsi/Kconfig	
> > 2005-08-25 13:44:33.000000000 +0900
> > > +++ linux-2.6.13-rc7/drivers/scsi/Kconfig	2005-08-25 
> > 14:33:38.000000000 +0900
> > > @@ -424,7 +424,7 @@
> > >  source "drivers/scsi/megaraid/Kconfig.megaraid"
> > >  
> > >  config SCSI_SATA
> > > -	tristate "Serial ATA (SATA) support"
> > > +	bool "Serial ATA (SATA) support"
> > >  	depends on SCSI
> > >  	help
> > >  	  This driver family supports Serial ATA host controllers
> > 
> > No, this bug reintroduces a problem with SCSI=m.
> 
> Please explain this bug in detail. 

Assuming your patch is applied:

With SCSI=m and SCSI_SATA=y this allows the static enabling of the SATA 
drivers with unwanted effects, e.g.:
- SCSI=m, SCSI_SATA=y, SCSI_ATA_ADMA=y
  -> SCSI_ATA_ADMA is built statically but scsi/built-in.o is not linked 
     into the kernel
- SCSI=m, SCSI_SATA=y, SCSI_ATA_ADMA=y, SCSI_SATA_AHCI=m
  -> SCSI_ATA_ADMA and libata are built statically but 
     scsi/built-in.o is not linked into the kernel,
     SCSI_SATA_AHCI is built modular (unresolved symbols due to missing 
                                      libata)

> > Which problem do you face?
> > And how did this change alone fix it for you?
> 
> I am using Intel 82801EB SATA controller.
> 2.6.13-rc7-libata1.patch.bz2 worked as PATA when 82801EB was used in a combined mode. 
> Does quirk_intel_ide_combined() work effectively?

I do still not see how your proposed patch would have _any_ influence on 
your problem.

> Thanks,
> Haruo

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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