From: Alan Cox Date: Thu, 3 Jan 2008 17:22:28 +0000 (+0000) Subject: libata-sff: PCI IRQ handling fix X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=277d72a37431d200727189693b14488368b7c258;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git 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 Signed-off-by: Jeff Garzik --- diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 48acc09dab9..b7ac80b4b1f 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -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,