lightnvm: free memory when gennvm register fails

free allocated nvm block and gennvm lun structures when
gennvm register fails, otherwise it will cause memory leak.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 10 insertions, 5 deletions

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index e20e74ec6b91..3969a9875e59 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -207,6 +207,14 @@ static int gennvm_blocks_init(struct nvm_dev *dev, struct gen_nvm *gn)
         return 0;
 }
 
+static void gennvm_free(struct nvm_dev *dev)
+{
+        gennvm_blocks_free(dev);
+        gennvm_luns_free(dev);
+        kfree(dev->mp);
+        dev->mp = NULL;
+}
+
 static int gennvm_register(struct nvm_dev *dev)
 {
         struct gen_nvm *gn;
@@ -234,16 +242,13 @@ static int gennvm_register(struct nvm_dev *dev)
 
         return 1;
 err:
-        kfree(gn);
+        gennvm_free(dev);
         return ret;
 }
 
 static void gennvm_unregister(struct nvm_dev *dev)
 {
-        gennvm_blocks_free(dev);
-        gennvm_luns_free(dev);
-        kfree(dev->mp);
-        dev->mp = NULL;
+        gennvm_free(dev);
 }
 
 static struct nvm_block *gennvm_get_blk(struct nvm_dev *dev,