btrfs: correct try_lock_extent() usage in read_extent_buffer_subpage()

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try_lock_extent() returns 1 on success or 0 for failure and not an error
code. If try_lock_extent() fails, read_extent_buffer_subpage() returns
zero indicating subpage extent read success.

Return EAGAIN/EWOULDBLOCK if try_lock_extent() fails in locking the
extent.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Goldwyn Rodrigues 2021-04-08 07:40:25 -05:00 • committed by David Sterba

parent 13311e7425

commit dc56219fe2

1 changed files with 2 additions and 4 deletions

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fs/btrfs/extent_io.c

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