block: fix checking return value of blk_mq_init_queue

Check IS_ERR_OR_NULL(return value) instead of just return value.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Reduced to IS_ERR() by me, we never return NULL.
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index ae9f615..aa2224a 100644 (file)
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -530,7 +530,7 @@ static int null_add_dev(void)
                        goto out_cleanup_queues;
 
                nullb->q = blk_mq_init_queue(&nullb->tag_set);
-               if (!nullb->q) {
+               if (IS_ERR(nullb->q)) {
                        rv = -ENOMEM;
                        goto out_cleanup_tags;
                }

diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index 52d0f2d..f7d083b 100644 (file)
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -1376,7 +1376,7 @@ static int nvme_alloc_admin_tags(struct nvme_dev *dev)
                        return -ENOMEM;
 
                dev->admin_q = blk_mq_init_queue(&dev->admin_tagset);
-               if (!dev->admin_q) {
+               if (IS_ERR(dev->admin_q)) {
                        blk_mq_free_tag_set(&dev->admin_tagset);
                        return -ENOMEM;
                }

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 7ef7c09..cdfbd21 100644 (file)
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -638,7 +638,7 @@ static int virtblk_probe(struct virtio_device *vdev)
                goto out_put_disk;
 
        q = vblk->disk->queue = blk_mq_init_queue(&vblk->tag_set);
-       if (!q) {
+       if (IS_ERR(q)) {
                err = -ENOMEM;
                goto out_free_tags;
        }