lightnvm: fix bio submission issue

Put bio when submission fails, since we get it
before submission. And return error when backend
device driver doesn't provide a submit_io method,
thus we can end IO properly.

Signed-off-by: Wenwei Tao <ww.tao0320@gmail.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index a54b339951a3..62c6f4d11f24 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -345,7 +345,7 @@ static void gennvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
 static int gennvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
 {
         if (!dev->ops->submit_io)
-                return 0;
+                return -ENODEV;
 
         /* Convert address space */
         gennvm_generic_to_addr_mode(dev, rqd);