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

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Message-ID: <0BEA8552-A2D0-4B70-A9CF-98A019726FCC@cnexlabs.com>
Date:   Mon, 15 May 2017 06:31:58 +0000
From:   Javier Gonzalez <javier@...xlabs.com>
To:     Rakesh Pandit <rakesh@...era.com>
CC:     Matias Bjørling <matias@...xlabs.com>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ligtnvm: if LUNs are already allocated fix return

> 
> On 13 May 2017, at 21.50, 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>
> ---
> 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 <javier@...xlabs.com>


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