From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: rmk@arm.linux.org.uk (Russell King)
Cc: adam@yggdrasil.com (Adam J. Richter), linux-kernel@vger.kernel.org
Subject: Re: linux-2.5.6 scsi DMA mapping and compilation fixes (not yet working)
Date: Wed, 13 Mar 2002 16:51:49 +0000 (GMT) [thread overview]
Message-ID: <E16lByf-0006ph-00@the-village.bc.nu> (raw)
In-Reply-To: <20020312234256.B13558@flint.arm.linux.org.uk> from "Russell King" at Mar 12, 2002 11:42:56 PM
> I believe changes to NCR53c80 were recently reverted back because
> these "fixes" lead to massive data corruption. It is preferable
> that the driver remains unbuildable, and therefore doesn't cause
> data corruption than to be buildable and case data corruption.
Someone "fixed" the 2.5 one by just frobbing randomly with the
io_request_lock without noticing its not always used per queue in the driver
(study the host list code - and dont think you can just clean that up by
using SHIRQ - that wont help on some non x86 stuff). I fed Dave Jones
the 2.4 stuff where the locking is fixed (tho using io_request_lock) and
actually works SMP.
Dave then I suspect fed it to Linus
next prev parent reply other threads:[~2002-03-13 16:37 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-12 20:56 Adam J. Richter
2002-03-12 23:42 ` Russell King
2002-03-13 16:51 ` Alan Cox [this message]
2002-03-12 23:55 Adam J. Richter
2002-03-13 0:02 ` Russell King
2002-03-13 14:31 ` Dave Jones
2002-03-13 0:23 Adam J. Richter
2002-03-13 14:33 ` Dave Jones
2002-03-13 15:51 Adam J. Richter
2002-03-13 16:22 ` Alan Cox
2002-03-13 17:17 Adam J. Richter
2002-03-13 17:38 ` Alan Cox
2002-03-14 1:02 Adam J. Richter
2002-03-14 1:27 ` Alan Cox
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