cfq-iosched: free cic_index if cfqd allocation fails

When struct cfq_data allocation fails, cic_index need to be freed.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 6dd2179cf1a4..7c52d6888924 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -3973,8 +3973,12 @@ static void *cfq_init_queue(struct request_queue *q)
                 return NULL;
 
         cfqd = kmalloc_node(sizeof(*cfqd), GFP_KERNEL | __GFP_ZERO, q->node);
-        if (!cfqd)
+        if (!cfqd) {
+                spin_lock(&cic_index_lock);
+                ida_remove(&cic_index_ida, i);
+                spin_unlock(&cic_index_lock);
                 return NULL;
+        }
 
         /*
          * Don't need take queue_lock in the routine, since we are