linux-kernel - Re: [PATCH 3/3] Make ide dma blacklist handling a bit saner.

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Message-Id: <200705282141.42507.bzolnier@gmail.com>
Date:	Mon, 28 May 2007 21:41:42 +0200
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Junio C Hamano <junkio@....net>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org, Dave Jones <davej@...hat.com>
Subject: Re: [PATCH 3/3] Make ide dma blacklist handling a bit saner.

Hi,

On Tuesday 22 May 2007, Junio C Hamano wrote:
> Earlier, the matching of (model,rev) in ide-dma black/white list
> handling was to consider "ALL" in the table to match any
> revision.  This changes the wildcard to NULL.  This way, the
> DMA_BLACK_LIST macro used in the previous patch does not have to
> use a slightly funky compile time constant expression to convert
> NULL to "ALL".
> 
> Signed-off-by: Junio C Hamano <junkio@....net>

The change itself looks good but IMO it is worth doing it before patch #2/3
(it would also make it possible for me to merge this patch immediately).

When it comes to patch #2 - Alan's comment may be a bit harsh but he seems
to be right - there should be a common library-like file (ata-blacklist.c
or ata-quirks.c or whatever name you like) containing ata_device_blacklist[].

This would require slight modification of ide_in_drive_list() to teach
it about ATA_HORKAGE_DMA but as I see from this patch this shouldn't be
a problem for you. ;)  Please also note that <linux/ata.h> is used by both
IDE and libata so it should be a good place to put struct ata_blacklist_entry
and ATA_HORKAGE_* macros.

Care to respin both patches?

>  * I do not really know what I am doing in the mips area, but
>    that architecture specific table seems to be used by the same
>    ide_in_drive_list() function, so the entries are matched to
>    the updated code.

Yep, thanks for not breaking AMD Alchemy IDE suppport.

It looks like au1xxx_ide.h should really be in drivers/ide/mips because
it is only included from drivers/ide/mips/au1xxx_ide.c - could somebody
verify this and send me a patch?

Thanks,
Bart
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