linux-kernel - Re: [PATCH 20/30] blk_end_request: changing xsysace (take 4)

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Date:	Wed, 12 Dec 2007 11:09:12 +0200
From:	Boaz Harrosh <bharrosh@...asas.com>
To:	Kiyoshi Ueda <k-ueda@...jp.nec.com>
CC:	jens.axboe@...cle.com, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org, linux-ide@...r.kernel.org,
	dm-devel@...hat.com, j-nomura@...jp.nec.com,
	grant.likely@...retlab.ca
Subject: Re: [PATCH 20/30] blk_end_request: changing xsysace (take 4)

Kiyoshi Ueda wrote:
> This patch converts xsysace to use blk_end_request interfaces.
> Related 'uptodate' arguments are converted to 'error'.
> 
> xsysace is a little bit different from "normal" drivers.
> xsysace driver has a state machine in it.
> It calls end_that_request_first() and end_that_request_last()
> from different states. (ACE_FSM_STATE_REQ_TRANSFER and
> ACE_FSM_STATE_REQ_COMPLETE, respectively.)
> 
> However, those states are consecutive and without any interruption
> inbetween.
> So we can just follow the standard conversion rule (b) mentioned in
> the patch subject "[PATCH 01/30] blk_end_request: add new request
> completion interface".
> 
> Cc: Grant Likely <grant.likely@...retlab.ca>
> Signed-off-by: Kiyoshi Ueda <k-ueda@...jp.nec.com>
> Signed-off-by: Jun'ichi Nomura <j-nomura@...jp.nec.com>
> ---
>  drivers/block/xsysace.c |    5 +----
>  1 files changed, 1 insertion(+), 4 deletions(-)
> 
> Index: 2.6.24-rc4/drivers/block/xsysace.c
> ===================================================================
> --- 2.6.24-rc4.orig/drivers/block/xsysace.c
> +++ 2.6.24-rc4/drivers/block/xsysace.c
> @@ -703,7 +703,7 @@ static void ace_fsm_dostate(struct ace_d
>  
>  		/* bio finished; is there another one? */
>  		i = ace->req->current_nr_sectors;
> -		if (end_that_request_first(ace->req, 1, i)) {
> +		if (__blk_end_request(ace->req, 0, i)) {
end_that_request_first() took sectors __blk_end_request() now takes
bytes

>  			/* dev_dbg(ace->dev, "next block; h=%li c=%i\n",
>  			 *      ace->req->hard_nr_sectors,
>  			 *      ace->req->current_nr_sectors);
> @@ -718,9 +718,6 @@ static void ace_fsm_dostate(struct ace_d
>  		break;
>  
>  	case ACE_FSM_STATE_REQ_COMPLETE:
> -		/* Complete the block request */
> -		blkdev_dequeue_request(ace->req);
> -		end_that_request_last(ace->req, 1);
>  		ace->req = NULL;
>  
>  		/* Finished request; go to idle state */
> -
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Boaz
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