linux-kernel - Re: [PATCH v4 34/78] atari_NCR5380: Use arbitration timeout

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Date:	Tue, 26 Jan 2016 11:18:18 +1100 (AEDT)
From:	Finn Thain <fthain@...egraphics.com.au>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
cc:	"James E.J. Bottomley" <JBottomley@...n.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Michael Schmitz <schmitzmic@...il.com>,
	Linux/m68k <linux-m68k@...r.kernel.org>,
	scsi <linux-scsi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 34/78] atari_NCR5380: Use arbitration timeout

On Mon, 25 Jan 2016, Geert Uytterhoeven wrote:

> > In principle I think that Linux drivers should not carry workarounds 
> > for emulators.
> 
> Please consider ARAnyM is the current m68k workhorse, so it would be 
> nice to handle this someway.

AFAICT atari_scsi on aranym never did anything useful. Those aranym users 
who need to run Linux 4.5 can set CONFIG_ATARI_SCSI=n or blacklist the 
atari_scsi module (up until aranym can be patched).

> 
> Alternatively, we need to fix ARAnyM,

I'll look into writing a patch for the emulator after I've finished 
testing the exception handling fixes for the driver.

> or can make the creation of the atari_scsi platform device conditional 
> on not running under ARAnyM.

Fixing the emulator is the only sensible approach. If S operating systems 
have to carry workarounds for B emulator bugs, the cost is (at least) 
proportional to S * B.

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