linux-kernel - Re: [PATCH]: Fix IDE host

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Date:	Tue, 23 Oct 2007 22:45:24 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	David Miller <davem@...emloft.net>, torvalds@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH]: Fix IDE host_flags regression.

> - IDE_HFLAG_ERROR_STOPS_FIFO (the error path of pdc202xx_{old,new}) 

I've been playing with this a bit in libata - it seems the pdc202xx is a
bit more complicated. An error doesn't stop the FIFO, a reset does.

The problem thus seems to be triggered ultimately by the fact we call the
timeout method before doing a FIFO drain in some cases, and also that old
IDE tries to use PIO to flush a DRQ when the failing taskfile is a DMA
operation not PIO..

Alan

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