lightnvm: pblk: line reference fix in GC

Fixes the GC error case when moving a line back to closed state
while releasing additional references.

Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Reviewed-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Reviewed-by: Javier González <javier@javigon.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
index 26a52ea..901e499 100644 (file)
--- a/drivers/lightnvm/pblk-gc.c
+++ b/drivers/lightnvm/pblk-gc.c
@@ -290,8 +290,11 @@ fail_free_invalid_bitmap:
 fail_free_ws:
        kfree(line_ws);
 
+       /* Line goes back to closed state, so we cannot release additional
+        * reference for line, since we do that only when we want to do
+        * gc to free line state transition.
+        */
        pblk_put_line_back(pblk, line);
-       kref_put(&line->ref, pblk_line_put);
        atomic_dec(&gc->read_inflight_gc);
 
        pblk_err(pblk, "failed to GC line %d\n", line->id);