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Btrfs: fix BUG_ON in btrfs_submit_compressed_write 

This is similar to btrfs_submit_compressed_read(), if we fail after
bio is allocated, then we can use bio_endio() and errors are saved
 in bio->bi_error.  But please note that we don't return errors to
its caller because the caller assumes it won't call endio to cleanup
on error.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Liu Bo 2016-06-22 18:32:06 -07:00 committed by David Sterba
parent e2bf6e89b4
commit f5daf2c780
1 changed files with 8 additions and 2 deletions
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10
fs/btrfs/compression.c
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@ -402,7 +402,10 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
}
ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
BUG_ON(ret); /* -ENOMEM */
if (ret) {
bio->bi_error = ret;
bio_endio(bio);
}
bio_put(bio);
@ -432,7 +435,10 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
}
ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
BUG_ON(ret); /* -ENOMEM */
if (ret) {
bio->bi_error = ret;
bio_endio(bio);
}
bio_put(bio);
return 0;