linux-kernel - Re: [PATCH V3] lightnvm: if LUNs are already allocated fix return

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Date:   Tue, 27 Jun 2017 13:57:08 +0200
From:   Frans Klaver <fransklaver@...il.com>
To:     Rakesh Pandit <rakesh@...era.com>
Cc:     Jens Axboe <axboe@...com>,
        Matias Bjørling <m@...rling.me>,
        linux-block@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Matias Bjørling <matias@...xlabs.com>,
        Javier González <jg@...htnvm.io>
Subject: Re: [PATCH V3] lightnvm: if LUNs are already allocated fix return

On Tue, Jun 27, 2017 at 1:55 PM, Rakesh Pandit <rakesh@...era.com> wrote:
> While creating new device with NVM_DEV_CREATE if LUNs are already
> allocated ioctl would return -ENOMEM which is wrong.  This patch
> propagates -EBUSY from nvm_reserve_luns which is correct response.
>
> Fixes: ade69e243 ("lightnvm: merge gennvm with core")
> Signed-off-by: Rakesh Pandit <rakesh@...era.com>

Reviewed-by: Frans Klaver <fransklaver@...il.com>

> ---
>
> V3: Propagate return value from nvm_reserve_luns instead of hard-coding (Frans)
> V2: return error code directly instead of using ret variable (Frans)
>
>  drivers/lightnvm/core.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
> index b8f82f5..ddae430 100644
> --- a/drivers/lightnvm/core.c
> +++ b/drivers/lightnvm/core.c
> @@ -252,8 +252,9 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
>         }
>         mutex_unlock(&dev->mlock);
>
> -       if (nvm_reserve_luns(dev, s->lun_begin, s->lun_end))
> -               return -ENOMEM;
> +       ret = nvm_reserve_luns(dev, s->lun_begin, s->lun_end);
> +       if (ret)
> +               return ret;
>
>         t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
>         if (!t) {
> --
> 2.5.5
>