btrfs: reset this_bio_flag to avoid inheriting old flags
In btrfs_do_readpage(), we never reset @this_bio_flag after we hit a compressed extent. This is fine, as for PAGE_SIZE == sectorsize case, we can only have one sector for one page, thus @this_bio_flag will only be set at most once. But for subpage case, after hitting a compressed extent, @this_bio_flag will always have EXTENT_BIO_COMPRESSED bit, even we're reading a regular extent. This will lead to various read errors, and causing new ASSERT() in incoming subpage patches, which adds more strict check in btrfs_submit_compressed_read(). Fix it by declaring @this_bio_flag inside the main loop and reset its value for each iteration. Reviewed-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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