18 files changed, 450 insertions, 153 deletions

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index e3b9692b9688..841f4e2cfe08 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -269,6 +269,8 @@ static struct pci_device_id ahci_pci_tbl[] = {
           board_ahci }, /* ESB2 */
         { PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
           board_ahci }, /* ESB2 */
+        { PCI_VENDOR_ID_INTEL, 0x27c6, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+          board_ahci }, /* ICH7-M DH */
         { }     /* terminate list */
 };
 
@@ -584,12 +586,16 @@ static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
 
 static void ahci_eng_timeout(struct ata_port *ap)
 {
-        void *mmio = ap->host_set->mmio_base;
+        struct ata_host_set *host_set = ap->host_set;
+        void *mmio = host_set->mmio_base;
         void *port_mmio = ahci_port_base(mmio, ap->port_no);
         struct ata_queued_cmd *qc;
+        unsigned long flags;
 
         DPRINTK("ENTER\n");
 
+        spin_lock_irqsave(&host_set->lock, flags);
+
         ahci_intr_error(ap, readl(port_mmio + PORT_IRQ_STAT));
 
         qc = ata_qc_from_tag(ap, ap->active_tag);
@@ -607,6 +613,7 @@ static void ahci_eng_timeout(struct ata_port *ap)
                 ata_qc_complete(qc, ATA_ERR);
         }
 
+        spin_unlock_irqrestore(&host_set->lock, flags);
 }
 
 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
@@ -696,9 +703,6 @@ static int ahci_qc_issue(struct ata_queued_cmd *qc)
         struct ata_port *ap = qc->ap;
         void *port_mmio = (void *) ap->ioaddr.cmd_addr;
 
-        writel(1, port_mmio + PORT_SCR_ACT);
-        readl(port_mmio + PORT_SCR_ACT);        /* flush */
-
         writel(1, port_mmio + PORT_CMD_ISSUE);
         readl(port_mmio + PORT_CMD_ISSUE);      /* flush */
 
diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c
index d96ebf9d2228..03695616e59e 100644
--- a/drivers/scsi/ata_piix.c
+++ b/drivers/scsi/ata_piix.c
@@ -629,13 +629,13 @@ static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
         port_info[1] = NULL;
 
         if (port_info[0]->host_flags & PIIX_FLAG_AHCI) {
-               u8 tmp;
-               pci_read_config_byte(pdev, PIIX_SCC, &tmp);
-               if (tmp == PIIX_AHCI_DEVICE) {
-                       int rc = piix_disable_ahci(pdev);
-                       if (rc)
-                           return rc;
-               }
+                u8 tmp;
+                pci_read_config_byte(pdev, PIIX_SCC, &tmp);
+                if (tmp == PIIX_AHCI_DEVICE) {
+                        int rc = piix_disable_ahci(pdev);
+                        if (rc)
+                                return rc;
+                }
         }
 
         if (port_info[0]->host_flags & PIIX_FLAG_COMBINED) {
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index f4e7dcb6492b..f15a07f9f471 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1304,12 +1304,12 @@ static inline u8 ata_dev_knobble(struct ata_port *ap)
 /**
  *      ata_dev_config - Run device specific handlers and check for
  *                       SATA->PATA bridges
- *      @ap: Bus 
+ *      @ap: Bus
  *      @i:  Device
  *
  *      LOCKING:
  */
- 
+
 void ata_dev_config(struct ata_port *ap, unsigned int i)
 {
         /* limit bridge transfers to udma5, 200 sectors */
@@ -2377,6 +2377,27 @@ static int ata_sg_setup(struct ata_queued_cmd *qc)
 }
 
 /**
+ *      ata_poll_qc_complete - turn irq back on and finish qc
+ *      @qc: Command to complete
+ *      @drv_stat: ATA status register content
+ *
+ *      LOCKING:
+ *      None.  (grabs host lock)
+ */
+
+void ata_poll_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
+{
+        struct ata_port *ap = qc->ap;
+        unsigned long flags;
+
+        spin_lock_irqsave(&ap->host_set->lock, flags);
+        ap->flags &= ~ATA_FLAG_NOINTR;
+        ata_irq_on(ap);
+        ata_qc_complete(qc, drv_stat);
+        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+}
+
+/**
  *      ata_pio_poll -
  *      @ap:
  *
@@ -2438,11 +2459,10 @@ static void ata_pio_complete (struct ata_port *ap)
         u8 drv_stat;
 
         /*
-         * This is purely hueristic.  This is a fast path.
-         * Sometimes when we enter, BSY will be cleared in
-         * a chk-status or two.  If not, the drive is probably seeking
-         * or something.  Snooze for a couple msecs, then
-         * chk-status again.  If still busy, fall back to
+         * This is purely heuristic.  This is a fast path.  Sometimes when
+         * we enter, BSY will be cleared in a chk-status or two.  If not,
+         * the drive is probably seeking or something.  Snooze for a couple
+         * msecs, then chk-status again.  If still busy, fall back to
          * PIO_ST_POLL state.
          */
         drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10);
@@ -2467,9 +2487,7 @@ static void ata_pio_complete (struct ata_port *ap)
 
         ap->pio_task_state = PIO_ST_IDLE;
 
-        ata_irq_on(ap);
-
-        ata_qc_complete(qc, drv_stat);
+        ata_poll_qc_complete(qc, drv_stat);
 }
 
 
@@ -2494,6 +2512,20 @@ void swap_buf_le16(u16 *buf, unsigned int buf_words)
 #endif /* __BIG_ENDIAN */
 }
 
+/**
+ *      ata_mmio_data_xfer - Transfer data by MMIO
+ *      @ap: port to read/write
+ *      @buf: data buffer
+ *      @buflen: buffer length
+ *      @do_write: read/write
+ *
+ *      Transfer data from/to the device data register by MMIO.
+ *