This adds a helper to get to the "other" drive on a pair connected
to a given hwif.
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
---
Note: You may want to use the 1 - select.b.unit construct instead,
as you prefer, I just used what was there and fixed it.
include/linux/ide.h | 7 +++++++
1 file changed, 7 insertions(+)
Index: linux-work/include/linux/ide.h
===================================================================
--- linux-work.orig/include/linux/ide.h 2007-10-18 10:41:42.000000000 +1000
+++ linux-work/include/linux/ide.h 2007-10-18 10:42:40.000000000 +1000
@@ -1454,4 +1454,11 @@ 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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