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| author | Ming Lei <ming.lei@redhat.com> | 2022-03-04 21:08:03 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2022-03-09 12:21:35 -0500 |
| commit | 69fe0f29892077f14b56e2a479b6bcf533209d53 (patch) | |
| tree | 26b37dbcc06ed8b12ff07482eb2fe060b89d3e1d /block/genhd.c | |
| parent | 168678d765d3659fddffe80a70668488066a9569 (diff) | |
block: add ->poll_bio to block_device_operations
Prepare for supporting IO polling for bio-based driver.
Add ->poll_bio callback so that bio-based driver can provide their own
logic for polling bio.
Also fix ->submit_bio_bio typo in comment block above
__submit_bio_noacct.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'block/genhd.c')
| -rw-r--r-- | block/genhd.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c index e351fac41bf2..1ed46a6f94f5 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -410,6 +410,10 @@ int __must_check device_add_disk(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 |