[PATCH 02/10] btrfs: cleanup btrfs_submit_dio_bio

[Christoph Hellwig <hch@lst.de>]

Remove the pointless goto just to return err and clean up the code flow
to be a little more straight forward.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/inode.c | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 67bb7876fdfa8..03335ce83a949 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7966,39 +7966,33 @@ static inline blk_status_t btrfs_submit_dio_bio(struct bio *bio,
 	bool write = btrfs_op(bio) == BTRFS_MAP_WRITE;
 	blk_status_t ret;
 
-	/* Check btrfs_submit_bio_hook() for rules about async submit. */
-	if (async_submit)
-		async_submit = !atomic_read(&BTRFS_I(inode)->sync_writers);
-
 	if (!write) {
 		ret = btrfs_bio_wq_end_io(fs_info, bio, BTRFS_WQ_ENDIO_DATA);
 		if (ret)
-			goto err;
+			return ret;
 	}
 
 	if (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)
 		goto map;
 
-	if (write && async_submit) {
-		ret = btrfs_wq_submit_bio(inode, bio, 0, file_offset,
-					  btrfs_submit_bio_start_direct_io);
-		goto err;
-	} else if (write) {
+	if (write) {
+		/* check btrfs_submit_data_bio() for async submit rules */
+		if (async_submit && !atomic_read(&BTRFS_I(inode)->sync_writers))
+			return btrfs_wq_submit_bio(inode, bio, 0, file_offset,
+					btrfs_submit_bio_start_direct_io);
 		/*
 		 * If we aren't doing async submit, calculate the csum of the
 		 * bio now.
 		 */
 		ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, file_offset, false);
 		if (ret)
-			goto err;
+			return ret;
 	} else {
 		btrfs_bio(bio)->csum = btrfs_csum_ptr(fs_info, dip->csums,
 						      file_offset - dip->file_offset);
 	}
 map:
-	ret = btrfs_map_bio(fs_info, bio, 0);
-err:
-	return ret;
+	return btrfs_map_bio(fs_info, bio, 0);
 }
 
 static void btrfs_submit_direct(const struct iomap_iter *iter,
-- 
2.30.2