Re: Kernel 2.6.x hangs with Symbios Logic 53c1010 Ultra3 SCSI Ada pter

[Matthew Wilcox <matthew@wil.cx>]

On Sat, Nov 06, 2004 at 12:03:58PM +0000, Christoph Hellwig wrote:
> On Sat, Nov 06, 2004 at 03:59:51AM +0000, Matthew Wilcox wrote:
> > On Sat, Nov 06, 2004 at 12:02:32AM -0000, Richard Waltham wrote:
> > > Good as a backup but the original PPR capability is defined in
> > > scan_scsi.c. Shouldn't scan_scsi.c take note of the bus mode and enable
> > > PPR capabilities accordingly? This would then cover this issue for all
> > > relevant LLDDs wouldn't it?
> > 
> > scan_scsi.c doesn't know what mode the bus is in.  scan_scsi.c doesn't
> > even know whether the bus is SPI, FC, iSCSI, SAS or SATA.
> 
> And PPR only makes sense for SPI anyway.  An good argument why this
> should move to the SPI transport class, which does know about SE vs HVD
> vs LVD.

That would make sense if more of this were done at a higher level.
As it is right now, the decision whether to use PPR, SDTR or WDTR is
entirely up to the driver.  I think there's a lot more consolidation
that could be done into the midlayer, but we should probably see what
other drivers requirements are before making it perfect for sym2.

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