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PCI: altera: Fix error when INTx is 4 

PCI interrupt lines start at 1, not at 0.  So, creates additional one
interrupt when register for irq domain.

Error when PCIe devices have 4 INTx:

  WARNING: CPU: 1 PID: 1 at kernel/irq/irqdomain.c:280
    irq_domain_associate+0x17c/0x1cc()
  error: hwirq 0x4 is too large for dummy

Tested on Ethernet adapter card with multi-functions.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Ley Foon Tan 2015-12-04 16:21:21 -06:00 committed by Bjorn Helgaas
parent ea1d3795f6
commit 99496bd297
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/host/pcie-altera.c
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@ -467,7 +467,7 @@ static int altera_pcie_init_irq_domain(struct altera_pcie *pcie)
struct device_node *node = dev->of_node;
/* Setup INTx */
pcie->irq_domain = irq_domain_add_linear(node, INTX_NUM,
pcie->irq_domain = irq_domain_add_linear(node, INTX_NUM + 1,
&intx_domain_ops, pcie);
if (!pcie->irq_domain) {
dev_err(dev, "Failed to get a INTx IRQ domain\n");