lightnvm: if LUNs are already allocated fix return

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")
Reviewed-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Rakesh Pandit <rakesh@tuxera.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index b8f82f5c6c0d..ddae430b6eae 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) {