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SubjectRe: linux-next: manual merge of the block tree with the xfs tree
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On 2 Sep 2015, at 03:16, Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi Jens,
>
> Today's linux-next merge of the block tree got a conflict in:
>
> fs/xfs/xfs_aops.c
>
> between commit:
>
> c9eb256eda44 ("xfs: return errors from partial I/O failures to files")
>
> from the xfs tree and commit:
>
> 4246a0b63bd8 ("block: add a bi_error field to struct bio")
>
> from the block tree.
>
> I fixed it up (I think - see below) and can carry the fix as necessary
> (no action is required).
>
> --
> Cheers,
> Stephen Rothwell sfr@canb.auug.org.au
>
> diff --cc fs/xfs/xfs_aops.c
> index c8637073ef25,c77499bcbd7a..000000000000
> --- a/fs/xfs/xfs_aops.c
> +++ b/fs/xfs/xfs_aops.c
> @@@ -354,8 -355,7 +353,8 @@@ xfs_end_bio
> {
> xfs_ioend_t *ioend = bio->bi_private;
>
> - if (!ioend->io_error && !test_bit(BIO_UPTODATE, &bio->bi_flags))
> - ioend->io_error = error;
> - ioend->io_error = bio->bi_error;
> ++ if (!ioend->io_error)
> ++ ioend->io_error = bio->bi_error;
>
> /* Toss bio and pass work off to an xfsdatad thread */
> bio->bi_private = NULL;
>
>

This is incorrect; it can clear an earlier error status. It should probably read:

if (!ioend->io_error && bio->bi_error)
ioend->io_error = bio->bi_error;


Roger



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