diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index f36da488a2c1c1ee9a62e54637bf1d46e7f4c0fd..dbae6d9710414325f48423490761a52c4ce77fa8 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -645,8 +645,6 @@ static int ahci_reset_controller(void __iomem *mmio, struct pci_dev *pdev)
 	u32 cap_save, impl_save, tmp;
 
 	cap_save = readl(mmio + HOST_CAP);
-	cap_save &= ( (1<<28) | (1<<17) );
-	cap_save |= (1 << 27);
 	impl_save = readl(mmio + HOST_PORTS_IMPL);
 
 	/* global controller reset */