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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-10-18 18:30:05 -0400
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-18 18:30:05 -0400
commit1b678347121001c3c230c6eccfdf9f65c3ec1a4e (patch)
tree06fbd912de1d6cb032db4a25868fb8600d344c06 /include/linux
parentd85714d81cc0408daddb68c10f7fd69eafe7c213 (diff)
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>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/ide.h7
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)
1454 return dev ? pcibus_to_node(dev->bus) : -1; 1454 return dev ? pcibus_to_node(dev->bus) : -1;
1455} 1455}
1456 1456
1457static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1458{
1459 ide_hwif_t *hwif = HWIF(drive);
1460
1461 return &hwif->drives[(drive->dn ^ 1) & 1];
1462}
1463
1457#endif /* _IDE_H */ 1464#endif /* _IDE_H */