linux-kernel - Re: [PATCH] block: fix residual byte count handling

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Message-ID: <47CD53BA.5040908@gmail.com>
Date:	Tue, 04 Mar 2008 22:50:50 +0900
From:	Tejun Heo <htejun@...il.com>
To:	FUJITA Tomonori <tomof@....org>
CC:	efault@....de, jens.axboe@...cle.com,
	fujita.tomonori@....ntt.co.jp,
	James.Bottomley@...senPartnership.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	linux-scsi@...r.kernel.org, jgarzik@...ox.com, bzolnier@...il.com
Subject: Re: [PATCH] block: fix residual byte count handling

FUJITA Tomonori wrote:
>> Aiee... device going down after timing out on READ_DISC_INFO.  That's
>> gruesome.  Can you please try the other patches?
> 
> Tejun, I thought that libata needs a fix for sum(sg) != rq->data_len. No?

The extra_len you added to qc->nbytes should be it.  The only other
place to pay attention is the ATAPI transfer chunk size and your patch
seems to get it right.

> Now Jens' git tree should work with all the non libata stuff, ide,
> firewire, bsg, etc. But I'm not sure about libata.

With the second patch, all others should be fine no matter what.  I'll
go check libata part again.

Thanks.

-- 
tejun
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