[PATCH 19/22] libata: add dev->ap

[Tejun Heo <htejun@gmail.com>]

Add dev->ap which points back to the port the device belongs to.  This
makes it unnecessary to pass @ap for silly reasons (e.g. printks).
Also, this change is necessary to accomodate later PM support which
will introduce ATA link inbetween port and device.

Signed-off-by: Tejun Heo <htejun@gmail.com>

---

 drivers/scsi/libata-core.c |    1 +
 include/linux/libata.h     |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

d9d4fd3f482c7c5054b60ddde1d5b408b14ff288
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 128f84d..38a9833 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -4748,6 +4748,7 @@ static void ata_host_init(struct ata_por
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
 		struct ata_device *dev = &ap->device[i];
+		dev->ap = ap;
 		dev->devno = i;
 		dev->pio_mask = UINT_MAX;
 		dev->mwdma_mask = UINT_MAX;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index b719b16..8d7fbb3 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -358,6 +358,7 @@ struct ata_host_stats {
 };
 
 struct ata_device {
+	struct ata_port		*ap;
 	u64			n_sectors;	/* size of device, if ATA */
 	unsigned long		flags;		/* ATA_DFLAG_xxx */
 	unsigned int		class;		/* ATA_DEV_xxx */
-- 
1.2.4