linux-kernel - Re: [PATCH] virtio_blk: decrement index when blockdevice is removed

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Date:	Tue, 05 Apr 2011 07:08:12 +0200
From:	Jens Axboe <jaxboe@...ionio.com>
To:	Takuma Umeya <tumeya@...hat.com>
CC:	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Christoph Hellwig <hch@....de>,
	john cooper <john.cooper@...hat.com>,
	Tejun Heo <tj@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] virtio_blk: decrement index when blockdevice is removed

On 2011-04-05 06:49, Takuma Umeya wrote:
> When virtio block device is removed, index does not get decremented. When 
> another virtio disk is attached it uses the next device letter to the 
> one that is suppose to be available. 
> 
> Signed-off-by: Takuma Umeya <tumeya@...hat.com>
> 
> diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
> index 6ecf89c..730e7af 100644
> --- a/drivers/block/virtio_blk.c
> +++ b/drivers/block/virtio_blk.c
> @@ -489,6 +489,7 @@ static void __devexit virtblk_remove(struct virtio_device *vdev)
>         mempool_destroy(vblk->pool);
>         vdev->config->del_vqs(vdev);
>         kfree(vblk);
> +       index--;
>  }
>  
>  static const struct virtio_device_id id_table[] = {

What happens when you delete a device that isn't the last one?

-- 
Jens Axboe

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