diff options
| -rw-r--r-- | block/genhd.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/block/genhd.c b/block/genhd.c index 5da3c9a64e64..befb7a516bcf 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -400,21 +400,23 @@ int __must_check add_disk_fwnode(struct device *parent, struct gendisk *disk, struct device *ddev = disk_to_dev(disk); int ret; - /* Only makes sense for bio-based to set ->poll_bio */ - if (queue_is_mq(disk->queue) && disk->fops->poll_bio) - return -EINVAL; - - /* - * The disk queue should now be all set with enough information about - * the device for the elevator code to pick an adequate default - * elevator if one is needed, that is, for devices requesting queue - * registration. - */ - elevator_init_mq(disk->queue); + if (queue_is_mq(disk->queue)) { + /* + * ->submit_bio and ->poll_bio are bypassed for blk-mq drivers. + */ + if (disk->fops->submit_bio || disk->fops->poll_bio) + return -EINVAL; - /* Mark bdev as having a submit_bio, if needed */ - if (disk->fops->submit_bio) + /* + * Initialize the I/O scheduler code and pick a default one if + * needed. + */ + elevator_init_mq(disk->queue); + } else { + if (!disk->fops->submit_bio) + return -EINVAL; bdev_set_flag(disk->part0, BD_HAS_SUBMIT_BIO); + } /* * If the driver provides an explicit major number it also must provide |