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    Subject[patch 29/40] ide: Add ide_get_paired_drive() helper

    -stable review patch. If anyone has any objections, please let us know.

    ------------------
    From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

    patch 1b678347121001c3c230c6eccfdf9f65c3ec1a4e in mainline.

    This adds a helper to get to the "other" drive on a pair connected
    to a given hwif.

    Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Andrew Morton <akpm@osdl.org>
    Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
    Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    include/linux/ide.h | 7 +++++++
    1 file changed, 7 insertions(+)

    --- a/include/linux/ide.h
    +++ b/include/linux/ide.h
    @@ -1437,4 +1437,11 @@ static inline int hwif_to_node(ide_hwif_
    return dev ? pcibus_to_node(dev->bus) : -1;
    }

    +static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
    +{
    + ide_hwif_t *hwif = HWIF(drive);
    +
    + return &hwif->drives[(drive->dn ^ 1) & 1];
    +}
    +
    #endif /* _IDE_H */
    --
    -
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