From 524d59f6e30aab5b618da55e604c802ccd83e708 Mon Sep 17 00:00:00 2001 From: Vignesh R Date: Fri, 29 Dec 2017 17:11:30 +0530 Subject: [PATCH] PCI: dra7xx: Fix legacy INTD IRQ handling Legacy INTD IRQ handling is broken on dra7xx due to fact that driver uses hwirq in range of 1-4 for INTA, INTD whereas IRQ domain is of size 4 which is numbered 0-3. Therefore when INTD IRQ line is used with pci-dra7xx driver following warning is seen: WARNING: CPU: 0 PID: 1 at kernel/irq/irqdomain.c:342 irq_domain_associate+0x12c/0x1c4 error: hwirq 0x4 is too large for dummy Fix this by using pci_irqd_intx_xlate() helper to translate the INTx 1-4 range into the 0-3 as done in other PCIe drivers. Suggested-by: Bjorn Helgaas Reported-by: Chris Welch Signed-off-by: Vignesh R Signed-off-by: Lorenzo Pieralisi Acked-by: Kishon Vijay Abraham I --- drivers/pci/dwc/pci-dra7xx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c index 4ab1135..3321da9 100644 --- a/drivers/pci/dwc/pci-dra7xx.c +++ b/drivers/pci/dwc/pci-dra7xx.c @@ -226,6 +226,7 @@ static int dra7xx_pcie_intx_map(struct irq_domain *domain, unsigned int irq, static const struct irq_domain_ops intx_domain_ops = { .map = dra7xx_pcie_intx_map, + .xlate = pci_irqd_intx_xlate, }; static int dra7xx_pcie_init_irq_domain(struct pcie_port *pp) @@ -269,7 +270,7 @@ static irqreturn_t dra7xx_pcie_msi_irq_handler(int irq, void *arg) case INTC: case INTD: generic_handle_irq(irq_find_mapping(dra7xx->irq_domain, - ffs(reg))); + ffs(reg) - 1)); break; } -- 2.7.4