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    SubjectRe: [dm-devel] [PATCH v3 11/26] block: Add submit_bio_wait(), remove from md
    On 10/02/2012 10:11 PM, Kent Overstreet wrote:
    > On Tue, Oct 02, 2012 at 03:41:32PM -0400, Vivek Goyal wrote:
    >> On Mon, Sep 24, 2012 at 03:34:51PM -0700, Kent Overstreet wrote:
    >>> Random cleanup - this code was duplicated and it's not really specific
    >>> to md.
    >>>
    >>> Also added the ability to return the actual error code.
    >>
    >> Who is going to make use of actual error code and why checking
    >> BIO_UPTODATE is not sufficient (as existing code is doing)?
    >
    > Some things do, though it's not common and I forget where I saw it -
    > checking for -ENOTSUPPORTED vs. other stuff
    >
    There are also additional error codes like -ENOLINK when the nexus
    is dropped. Quite useful in multipathed or clustered environs.

    Cheers,

    Hannes
    --
    Dr. Hannes Reinecke zSeries & Storage
    hare@suse.de +49 911 74053 688
    SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
    GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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