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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-10-19 00:30:05 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-19 00:30:05 +0200 |
| commit | 1b678347121001c3c230c6eccfdf9f65c3ec1a4e (patch) | |
| tree | 06fbd912de1d6cb032db4a25868fb8600d344c06 | |
| parent | d85714d81cc0408daddb68c10f7fd69eafe7c213 (diff) | |
| download | linux-1b678347121001c3c230c6eccfdf9f65c3ec1a4e.tar.bz2 | |
ide: Add ide_get_paired_drive() helper
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>
| -rw-r--r-- | include/linux/ide.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/ide.h b/include/linux/ide.h index e39ee2fa2607..69dbe7dc04be 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -1454,4 +1454,11 @@ static inline int hwif_to_node(ide_hwif_t *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 */ |