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Subject[patch 1/4] 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>

Index: 2.6-git/drivers/ata/ahci.c
===================================================================
--- 2.6-git.orig/drivers/ata/ahci.c
+++ 2.6-git/drivers/ata/ahci.c
@@ -211,6 +211,7 @@ 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 u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
@@ -1408,6 +1409,7 @@ static void ahci_thaw(struct ata_port *a
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);
@@ -1415,7 +1417,7 @@ static void ahci_thaw(struct ata_port *a
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)
@@ -1571,6 +1573,12 @@ static int ahci_port_start(struct ata_po
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;

/* power up port */
--
-
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