• Dave Chinner's avatar
    xfs: ensure we capture IO errors correctly · e0018738
    Dave Chinner authored
    Failed buffer readahead can leave the buffer in the cache marked
    with an error. Most callers that then issue a subsequent read on the
    buffer do not zero the b_error field out, and so we may incorectly
    detect an error during IO completion due to the stale error value
    left on the buffer.
    
    Avoid this problem by zeroing the error before IO submission. This
    ensures that the only IO errors that are detected those captured
    from are those captured from bio submission or completion.
    Signed-off-by: default avatarDave Chinner <dchinner@redhat.com>
    Reviewed-by: default avatarMark Tinguely <tinguely@sgi.com>
    Signed-off-by: default avatarBen Myers <bpm@sgi.com>
    
    (cherry picked from commit c163f9a1)
    e0018738
xfs_buf.c 41.4 KB