lightnvm: fix memory leak when submit fails

The allocated page is not released if error occurs in
nvm_submit_io_sync_raw(). __free_page() is moved ealier to avoid
possible memory leak issue.

Fixes: aff3fb18 ("lightnvm: move bad block and chunk state logic to core")
Signed-off-by: NPan Bian <bianpan2016@163.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

drivers/lightnvm/core.c

@@ -844,11 +844,10 @@ static int nvm_bb_chunk_sense(struct nvm_dev *dev, struct ppa_addr ppa)
 	rqd.ppa_addr = generic_to_dev_addr(dev, ppa);
 
 	ret = nvm_submit_io_sync_raw(dev, &rqd);
+	__free_page(page);
 	if (ret)
 		return ret;
 
-	__free_page(page);
-
 	return rqd.error;
 }