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libata-sff: PCI IRQ handling fix 

It is legitimate (although annoying and silly) for a PCI IDE controller
not to be assigned an interrupt and to be polled. The libata-sff code
should therefore not try and request IRQ 0 in this case.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Alan Cox 2008-01-03 17:22:28 +00:00 committed by Jeff Garzik
parent b14dabcdb6
commit 277d72a374
1 changed files with 5 additions and 2 deletions
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7
drivers/ata/libata-sff.c
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@ -806,7 +806,10 @@ int ata_pci_init_one(struct pci_dev *pdev,
if (rc)
goto err_out;
if (!legacy_mode) {
if (!legacy_mode && pdev->irq) {
/* We may have no IRQ assigned in which case we can poll. This
shouldn't happen on a sane system but robustness is cheap
in this case */
rc = devm_request_irq(dev, pdev->irq, pi->port_ops->irq_handler,
IRQF_SHARED, DRV_NAME, host);
if (rc)
@ -814,7 +817,7 @@ int ata_pci_init_one(struct pci_dev *pdev,
ata_port_desc(host->ports[0], "irq %d", pdev->irq);
ata_port_desc(host->ports[1], "irq %d", pdev->irq);
} else {
} else if (legacy_mode) {
if (!ata_port_is_dummy(host->ports[0])) {
rc = devm_request_irq(dev, ATA_PRIMARY_IRQ(pdev),
pi->port_ops->irq_handler,