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ahci: port_no should be used when clearing IRQ in ahci_thaw() 

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 <jgarzik@pobox.com>.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-01-27 11:04:26 +09:00 committed by Jeff Garzik
parent 7d620a4e53
commit a718728f9e
1 changed files with 1 additions and 1 deletions
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2
drivers/ata/ahci.c
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@ -1282,7 +1282,7 @@ 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);