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md: make md_flush_request() more readable

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Setting bio to NULL and checking 'if(!bio)' is redundant and looks strange,
just consolidate them into one condition. There are no functional changes.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Li Nan <linan122@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240528203149.2383260-1-linan666@huaweicloud.com
This commit is contained in:
Li Nan
2024-05-29 04:31:49 +08:00
committed by Song Liu
parent 611d5cbc0b
commit acc6680af2
1 changed files with 13 additions and 15 deletions
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28
drivers/md/md.c
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@@ -657,24 +657,22 @@ bool md_flush_request(struct mddev *mddev, struct bio *bio)
WARN_ON(percpu_ref_is_zero(&mddev->active_io));
percpu_ref_get(&mddev->active_io);
mddev->flush_bio = bio;
bio = NULL;
}
spin_unlock_irq(&mddev->lock);
if (!bio) {
spin_unlock_irq(&mddev->lock);
INIT_WORK(&mddev->flush_work, submit_flushes);
queue_work(md_wq, &mddev->flush_work);
} else {
/* flush was performed for some other bio while we waited. */
if (bio->bi_iter.bi_size == 0)
/* an empty barrier - all done */
bio_endio(bio);
else {
bio->bi_opf &= ~REQ_PREFLUSH;
return false;
}
return true;
}
return true;
/* flush was performed for some other bio while we waited. */
spin_unlock_irq(&mddev->lock);
if (bio->bi_iter.bi_size == 0) {
/* pure flush without data - all done */
bio_endio(bio);
return true;
}
bio->bi_opf &= ~REQ_PREFLUSH;
return false;
}
EXPORT_SYMBOL(md_flush_request);