Re: [PATCH] ligtnvm: if LUNs are already allocated fix return

[Javier Gonzalez]

> 
> On 13 May 2017, at 21.50, Rakesh Pandit <rak...@tuxera.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 <rak...@tuxera.com>
> ---
> drivers/lightnvm/core.c | 11 ++++++-----
> 1 file changed, 6 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
> index 6a4aa60..440deb5 100644
> --- a/drivers/lightnvm/core.c
> +++ b/drivers/lightnvm/core.c
> @@ -235,7 +235,7 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct 
> nvm_ioctl_create *create)
>       struct nvm_target *t;
>       struct nvm_tgt_dev *tgt_dev;
>       void *targetdata;
> -     int ret;
> +     int ret = 0;
> 
>       tt = nvm_find_target_type(create->tgttype, 1);
>       if (!tt) {
> @@ -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)
> +             goto err;
> 
>       t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
>       if (!t) {
> @@ -314,8 +315,8 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct 
> nvm_ioctl_create *create)
>       mutex_lock(&dev->mlock);
>       list_add_tail(&t->list, &dev->targets);
>       mutex_unlock(&dev->mlock);
> -
> -     return 0;
> +err:
> +     return ret;
> err_sysfs:
>       if (tt->exit)
>               tt->exit(targetdata);
> --
> 2.9.3

Looks good.

Reviewed-by: Javier González <jav...@cnexlabs.com>

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