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>

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 6dd2179..7c52d68 100644 (file)
--- 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