linux-kernel - Re: [PATCH 03/11] block: add rq->resid

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Message-ID: <49FFB55B.9060902@kernel.org>
Date:	Tue, 05 May 2009 12:41:15 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Sergei Shtylyov <sshtylyov@...mvista.com>
CC:	axboe@...nel.dk, linux-kernel@...r.kernel.org, jeff@...zik.org,
	linux-ide@...r.kernel.org, James.Bottomley@...senPartnership.com,
	linux-scsi@...r.kernel.org, bzolnier@...il.com,
	petkovbb@...glemail.com, mike.miller@...com, Eric.Moore@....com,
	stern@...land.harvard.edu, fujita.tomonori@....ntt.co.jp,
	zaitcev@...hat.com, Geert.Uytterhoeven@...ycom.com,
	sfr@...b.auug.org.au, grant.likely@...retlab.ca,
	paul.clements@...eleye.com, tim@...erelk.net, jeremy@...source.com,
	adrian@...en.demon.co.uk, oakad@...oo.com, dwmw2@...radead.org,
	schwidefsky@...ibm.com, ballabio_dario@....com,
	davem@...emloft.net, rusty@...tcorp.com.au,
	Markus.Lidel@...dowconnect.com, bharrosh@...asas.com,
	Doug Gilbert <dgilbert@...erlog.com>,
	"Darrick J. Wong" <djwong@...ibm.com>
Subject: Re: [PATCH 03/11] block: add rq->resid_len

Sergei Shtylyov wrote:
>> diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
>> index 7149224..3813a0e 100644
>> --- a/drivers/ide/ide-tape.c
>> +++ b/drivers/ide/ide-tape.c
>> @@ -380,7 +380,7 @@ static int ide_tape_callback(ide_drive_t *drive,
>> int dsc)
>>          }
>>  
>>          tape->first_frame += blocks;
>> -        rq->data_len -= blocks * tape->blk_size;
>> +        rq->resid_len = blk_rq_bytes(rq) - blocks * tape->blk_size;
> 
>    Is it already guaranteed that rq->data_len == blk_rq_bytes(rq) here?

Oops, no.  I'll move it to later ide-cleanup-rq-data_len-usages patch.

Thanks.

-- 
tejun
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