linux-kernel - Re: [PATCH 5/6] floppy: remove check for allocated queue on do_floppy

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Date:	Fri, 10 Aug 2012 13:36:53 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
Cc:	Jiri Kosina <jkosina@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
	linux-kernel@...r.kernel.org, Ben Hutchings <ben@...adent.org.uk>
Subject: Re: [PATCH 5/6] floppy: remove check for allocated queue on
 do_floppy_init error handling

On Thu, Aug 09, 2012 at 04:59:50PM -0300, Herton Ronaldo Krzesinski wrote:
> The check "if (disks[dr]->queue)" check is bogus, if we reach there
> for each dr should exist an queue allocated (note that we decrement dr
> first on entering the loop).
> 
> Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>

As mentioned in second patch, I like going trhough full array of drives
and do cleanup as needed instead of relying on "dr" variable. 

But if you don't like that, then I am not as such against this approach.
Was just trying to keep all put_disk() at one place.

Thanks
Vivek

> ---
>  drivers/block/floppy.c |   16 +++++++---------
>  1 file changed, 7 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
> index 3eafe93..438ffc9 100644
> --- a/drivers/block/floppy.c
> +++ b/drivers/block/floppy.c
> @@ -4332,15 +4332,13 @@ out_unreg_blkdev:
>  out_put_disk:
>  	while (dr--) {
>  		del_timer_sync(&motor_off_timer[dr]);
> -		if (disks[dr]->queue) {
> -			blk_cleanup_queue(disks[dr]->queue);
> -			/*
> -			 * put_disk() is not paired with add_disk() and
> -			 * will put queue reference one extra time. fix it.
> -			 */
> -			if (!disk_registered[dr])
> -				disks[dr]->queue = NULL;
> -		}
> +		blk_cleanup_queue(disks[dr]->queue);
> +		/*
> +		 * put_disk() is not paired with add_disk() and
> +		 * will put queue reference one extra time. fix it.
> +		 */
> +		if (!disk_registered[dr])
> +			disks[dr]->queue = NULL;
>  		put_disk(disks[dr]);
>  	}
>  	destroy_workqueue(floppy_wq);
> -- 
> 1.7.9.5
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