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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>
This commit is contained in:
Benjamin Herrenschmidt 2007-10-19 00:30:05 +02:00 committed by Bartlomiej Zolnierkiewicz
parent d85714d81c
commit 1b67834712
1 changed files with 7 additions and 0 deletions
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7
include/linux/ide.h
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@ -1454,4 +1454,11 @@ static inline int hwif_to_node(ide_hwif_t *hwif)
return dev ? pcibus_to_node(dev->bus) : -1; 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 */ #endif /* _IDE_H */