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[V3] lightnvm: if LUNs are already allocated fix return

Message ID 20170627115531.GA53387@dhcp-216.srv.tuxera.com (mailing list archive)
State New, archived
Headers show

Commit Message

Rakesh Pandit June 27, 2017, 11:55 a.m. UTC
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@tuxera.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(-)

Comments

Frans Klaver June 27, 2017, 11:57 a.m. UTC | #1
On Tue, Jun 27, 2017 at 1:55 PM, Rakesh Pandit <rakesh@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 <rakesh@tuxera.com>

Reviewed-by: Frans Klaver <fransklaver@gmail.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
>
Jens Axboe June 27, 2017, 2:22 p.m. UTC | #2
On 06/27/2017 05:55 AM, Rakesh Pandit 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.

Thanks, applied for 4.13.
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Patch

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) {