zram: avoid kunmap_atomic() of a NULL pointer

[platform/adaptation/renesas_rcar/renesas_kernel.git] / block / blk-core.c

diff --git a/block/blk-core.c b/block/blk-core.c
index c00e0bd..e45b321 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -708,9 +708,13 @@ blk_init_allocated_queue(struct request_queue *q, request_fn_proc *rfn,
        if (!q)
                return NULL;
 
-       if (blk_init_rl(&q->root_rl, q, GFP_KERNEL))
+       q->flush_rq = kzalloc(sizeof(struct request), GFP_KERNEL);
+       if (!q->flush_rq)
                return NULL;
 
+       if (blk_init_rl(&q->root_rl, q, GFP_KERNEL))
+               goto fail;
+
        q->request_fn           = rfn;
        q->prep_rq_fn           = NULL;
        q->unprep_rq_fn         = NULL;
@@ -733,12 +737,16 @@ blk_init_allocated_queue(struct request_queue *q, request_fn_proc *rfn,
        /* init elevator */
        if (elevator_init(q, NULL)) {
                mutex_unlock(&q->sysfs_lock);
-               return NULL;
+               goto fail;
        }
 
        mutex_unlock(&q->sysfs_lock);
 
        return q;
+
+fail:
+       kfree(q->flush_rq);
+       return NULL;
 }
 EXPORT_SYMBOL(blk_init_allocated_queue);
 
@@ -1127,7 +1135,7 @@ static struct request *blk_old_get_request(struct request_queue *q, int rw,
 struct request *blk_get_request(struct request_queue *q, int rw, gfp_t gfp_mask)
 {
        if (q->mq_ops)
-               return blk_mq_alloc_request(q, rw, gfp_mask, false);
+               return blk_mq_alloc_request(q, rw, gfp_mask);
        else
                return blk_old_get_request(q, rw, gfp_mask);
 }
@@ -1278,6 +1286,11 @@ void __blk_put_request(struct request_queue *q, struct request *req)
        if (unlikely(!q))
                return;
 
+       if (q->mq_ops) {
+               blk_mq_free_request(req);
+               return;
+       }
+
        blk_pm_put_request(req);
 
        elv_completed_request(q, req);
@@ -2340,7 +2353,7 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
        if (!req->bio)
                return false;
 
-       trace_block_rq_complete(req->q, req);
+       trace_block_rq_complete(req->q, req, nr_bytes);
 
        /*
         * For fs requests, rq is just carrier of independent bio's