ahci: Store interrupt value

Use a stored value for which interrupts to enable.  Changing this allows
us to selectively turn off certain interrupts later and have them
stay off.

Signed-off-by:  Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index d52b73ab795a..baf7d0562190 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -175,6 +175,7 @@ enum {
         AHCI_FLAG_32BIT_ONLY            = (1 << 28), /* force 32bit */
         AHCI_FLAG_MV_PATA               = (1 << 29), /* PATA port */
         AHCI_FLAG_NO_MSI                = (1 << 30), /* no PCI MSI */
+        AHCI_FLAG_NO_HOTPLUG            = (1 << 31), /* ignore PxSERR.DIAG.N */
 
         AHCI_FLAG_COMMON                = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
                                           ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
@@ -215,6 +216,7 @@ struct ahci_port_priv {
         unsigned int            ncq_saw_d2h:1;
         unsigned int            ncq_saw_dmas:1;
         unsigned int            ncq_saw_sdb:1;
+        u32                     intr_mask;      /* interrupts to enable */
 };
 
 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
@@ -1552,6 +1554,7 @@ static void ahci_thaw(struct ata_port *ap)
         void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
         void __iomem *port_mmio = ahci_port_base(ap);
         u32 tmp;
+        struct ahci_port_priv *pp = ap->private_data;
 
         /* clear IRQ */
         tmp = readl(port_mmio + PORT_IRQ_STAT);
@@ -1559,7 +1562,7 @@ static void ahci_thaw(struct ata_port *ap)
         writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
 
         /* turn IRQ back on */
-        writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
+        writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
 }
 
 static void ahci_error_handler(struct ata_port *ap)
@@ -1713,6 +1716,12 @@ static int ahci_port_start(struct ata_port *ap)
         pp->cmd_tbl = mem;
         pp->cmd_tbl_dma = mem_dma;
 
+        /*
+         * Save off initial list of interrupts to be enabled.
+         * This could be changed later
+         */
+        pp->intr_mask = DEF_PORT_IRQ;
+
         ap->private_data = pp;
 
         /* engage engines, captain */