ap->id is logcial port ID which is unique among all ATA ports and
doesn't have anything to do with hardware port index. ap->port_no is
the hardware port index and thus should be used when clearing IRQ mask
in ahci_thaw().
This problem has been spotted by Jeff Garzik <[EMAIL PROTECTED]>.
Signed-off-by: Tejun Heo <[EMAIL PROTECTED]>
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index ab73b0a..7f1bf85 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1281,7 +1281,7 @@ static void ahci_thaw(struct ata_port *ap)
/* clear IRQ */
tmp = readl(port_mmio + PORT_IRQ_STAT);
writel(tmp, port_mmio + PORT_IRQ_STAT);
- writel(1 << ap->id, mmio + HOST_IRQ_STAT);
+ writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
/* turn IRQ back on */
writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
-
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