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

[Matias Bjørling]

From: Rakesh Pandit <rak...@tuxera.com>

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>
Signed-off-by: Matias Bjørling <mat...@cnexlabs.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 b8f82f5..9ff348f 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