[PATCH] ahci: remove IRQ mask clearing from init_controller()

Initial IRQ mask clearing is done by libata-core by freezing all ports
prior to requesting IRQ.  Remove redundant IRQ clearing from
init_controller().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index f5734a97580a8396ed046dc2322799b4153337a3..68fd7667a082710b1dd745ede2dee8f7efae740c 100644 (file)
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -662,14 +662,13 @@ static void ahci_init_controller(void __iomem *mmio, struct pci_dev *pdev,
                VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
                writel(tmp, port_mmio + PORT_SCR_ERR);
 
-               /* clear & turn off port IRQ */
+               /* clear port IRQ */
                tmp = readl(port_mmio + PORT_IRQ_STAT);
                VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
                if (tmp)
                        writel(tmp, port_mmio + PORT_IRQ_STAT);
 
                writel(1 << i, mmio + HOST_IRQ_STAT);
-               writel(0, port_mmio + PORT_IRQ_MASK);
        }
 
        tmp = readl(mmio + HOST_CTL);