diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 56f0af2..31b65e0 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -4749,6 +4749,7 @@
 
 	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;