isci: unify isci_host data structures

Make it explicit that isci_host and scic_sds_controller are one in the same
object.

Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>
[removed ->ihost back pointer]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c
index 6c2d686..a5d5c0b 100644
--- a/drivers/scsi/isci/init.c
+++ b/drivers/scsi/isci/init.c
@@ -268,7 +268,7 @@
 
 static int __devinit isci_pci_init(struct pci_dev *pdev)
 {
-	int err, bar_num, bar_mask;
+	int err, bar_num, bar_mask = 0;
 	void __iomem * const *iomap;
 
 	err = pcim_enable_device(pdev);
@@ -556,7 +556,7 @@
 	for_each_isci_host(i, isci_host, pdev) {
 		isci_unregister(isci_host);
 		isci_host_deinit(isci_host);
-		scic_controller_disable_interrupts(isci_host->core_controller);
+		scic_controller_disable_interrupts(&isci_host->sci);
 	}
 }