1 files changed, 8 insertions, 4 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 */