1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
index 87f26cd60fae..3ed2f333d5a9 100644
--- a/drivers/scsi/sata_mv.c
+++ b/drivers/scsi/sata_mv.c
@@ -50,6 +50,12 @@ enum {
 
         MV_PCI_REG_BASE         = 0,
         MV_IRQ_COAL_REG_BASE    = 0x18000,      /* 6xxx part only */
+        MV_IRQ_COAL_CAUSE               = (MV_IRQ_COAL_REG_BASE + 0x08),
+        MV_IRQ_COAL_CAUSE_LO            = (MV_IRQ_COAL_REG_BASE + 0x88),
+        MV_IRQ_COAL_CAUSE_HI            = (MV_IRQ_COAL_REG_BASE + 0x8c),
+        MV_IRQ_COAL_THRESHOLD           = (MV_IRQ_COAL_REG_BASE + 0xcc),
+        MV_IRQ_COAL_TIME_THRESHOLD      = (MV_IRQ_COAL_REG_BASE + 0xd0),
+
         MV_SATAHC0_REG_BASE     = 0x20000,
         MV_FLASH_CTL            = 0x1046c,
         MV_GPIO_PORT_CTL        = 0x104f0,
@@ -1448,6 +1454,7 @@ static irqreturn_t mv_interrupt(int irq, void *dev_instance,
         struct ata_host_set *host_set = dev_instance;
         unsigned int hc, handled = 0, n_hcs;
         void __iomem *mmio = host_set->mmio_base;
+        struct mv_host_priv *hpriv;
         u32 irq_stat;
 
         irq_stat = readl(mmio + HC_MAIN_IRQ_CAUSE_OFS);
@@ -1469,6 +1476,17 @@ static irqreturn_t mv_interrupt(int irq, void *dev_instance,
                         handled++;
                 }
         }
+
+        hpriv = host_set->private_data;
+        if (IS_60XX(hpriv)) {
+                /* deal with the interrupt coalescing bits */
+                if (irq_stat & (TRAN_LO_DONE | TRAN_HI_DONE | PORTS_0_7_COAL_DONE)) {
+                        writelfl(0, mmio + MV_IRQ_COAL_CAUSE_LO);
+                        writelfl(0, mmio + MV_IRQ_COAL_CAUSE_HI);
+                        writelfl(0, mmio + MV_IRQ_COAL_CAUSE);
+                }
+        }
+
         if (PCI_ERR & irq_stat) {
                 printk(KERN_ERR DRV_NAME ": PCI ERROR; PCI IRQ cause=0x%08x\n",
                        readl(mmio + PCI_IRQ_CAUSE_OFS));