diff options
| author | Vignesh R <vigneshr@ti.com> | 2017-12-29 17:11:30 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-16 08:20:44 +0200 |
| commit | b36199bc9dada09c082b0c47516bd59b8bc38c9b (patch) | |
| tree | 21c6568991d626fc861a2bfa22a3b3e48f75d4bc /drivers/pci | |
| parent | ae85d34dd87144a4ab67d63e0ec7df35230f7f7c (diff) | |
PCI: dra7xx: Fix legacy INTD IRQ handling
commit 524d59f6e30aab5b618da55e604c802ccd83e708 upstream.
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 <bhelgaas@google.com>
Reported-by: Chris Welch <Chris.Welch@viavisolutions.com>
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/dwc/pci-dra7xx.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c index 63052c5e5f82..7f5dfa169d0f 100644 --- a/drivers/pci/dwc/pci-dra7xx.c +++ b/drivers/pci/dwc/pci-dra7xx.c @@ -227,6 +227,7 @@ 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) @@ -270,7 +271,7 @@ 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; } |