linux-kernel - Re: [PATCH] loop: Make user notify for adding loop device failed

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Date:	Tue, 07 Jun 2016 09:42:56 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Minfei Huang <mnghuan@...il.com>
Cc:	axboe@...com, ming.lei@...onical.com, viro@...iv.linux.org.uk,
	sagig@...lanox.com, mszeredi@...e.cz, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] loop: Make user notify for adding loop device failed

Minfei Huang <mnghuan@...il.com> writes:

> There is no error number returned if loop driver fails in function
> alloc_disk to add new loop device. Add a correct error number to make
> user notify in this case.
>
> Signed-off-by: Minfei Huang <mnghuan@...il.com>
> ---
>  drivers/block/loop.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/block/loop.c b/drivers/block/loop.c
> index 1fa8cc2..2caaf6f 100644
> --- a/drivers/block/loop.c
> +++ b/drivers/block/loop.c
> @@ -1765,6 +1765,7 @@ static int loop_add(struct loop_device **l, int i)
>  	 */
>  	queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, lo->lo_queue);
>  
> +	err = -ENOMEM;
>  	disk = lo->lo_disk = alloc_disk(1 << part_shift);
>  	if (!disk)
>  		goto out_free_queue;

Looks good.

Reviewed-by: Jeff Moyer <jmoyer@...hat.com>