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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-10-19 00:30:05 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-19 00:30:05 +0200
commit1b678347121001c3c230c6eccfdf9f65c3ec1a4e (patch)
tree06fbd912de1d6cb032db4a25868fb8600d344c06
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>
-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 e39ee2fa260..69dbe7dc04b 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 */