[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>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index f5734a97580a..68fd7667a082 100644
--- 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);