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>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
index 26a52ea7ec45..901e49951ab5 100644
--- 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);