commit be388d9fbd4e09582e31c3ee82a022e368208ae3
author Javier González <jg@lightnvm.io> Sat Apr 22 01:32:48 2017 +0200
committer Jens Axboe <axboe@fb.com> Sun Apr 23 16:57:52 2017 -0600
tree 7cd48c6139b78fb22d9a27cc4d49a4aa6af0e34b
parent 33db9fd46ea8e3e6d4757d99a3f97bd1a0c919f3

lightnvm: pblk: free metadata on line alloc failure

When a line allocation fails, for example, due to having too many bad
blocks, free its metadata correctly.

Fixes: a4bd217b4326 "lightnvm: physical block device (pblk) target"

Signed-off-by: Javier González <javier@cnexlabs.com>
Reviewed-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

drivers/lightnvm/pblk-core.c

diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 7eb62ec..ac3742b 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -1127,6 +1127,7 @@
 	spin_lock(&l_mg->free_lock);
 	retry_line = pblk_line_get(pblk);
 	if (!retry_line) {
+		l_mg->data_line = NULL;
 		spin_unlock(&l_mg->free_lock);
 		return NULL;
 	}
@@ -1134,18 +1135,17 @@
 	retry_line->smeta = line->smeta;
 	retry_line->emeta = line->emeta;
 	retry_line->meta_line = line->meta_line;
-	retry_line->map_bitmap = line->map_bitmap;
-	retry_line->invalid_bitmap = line->invalid_bitmap;
 
-	line->map_bitmap = NULL;
-	line->invalid_bitmap = NULL;
-	line->smeta = NULL;
-	line->emeta = NULL;
+	pblk_line_free(pblk, line);
 	l_mg->data_line = retry_line;
 	spin_unlock(&l_mg->free_lock);
 
-	if (pblk_line_erase(pblk, retry_line))
+	if (pblk_line_erase(pblk, retry_line)) {
+		spin_lock(&l_mg->free_lock);
+		l_mg->data_line = NULL;
+		spin_unlock(&l_mg->free_lock);
 		return NULL;
+	}
 
 	pblk_rl_free_lines_dec(&pblk->rl, retry_line);
 
@@ -1299,6 +1299,8 @@
 
 	line->map_bitmap = NULL;
 	line->invalid_bitmap = NULL;
+	line->smeta = NULL;
+	line->emeta = NULL;
 }
 
 void pblk_line_put(struct kref *ref)