[PATCH] libata: add dev->ap

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>

2 files changed, 2 insertions, 0 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 56f0af208345..31b65e0da0b1 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -4749,6 +4749,7 @@ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
 
         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 cd467cd54473..ac2d2cc78b10 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 */