The interrupt pin cell in "interrupt-map" property
is defined only for legacy interrupts with a valid
range in [1-4] corrspoding to INTA#..INTD#. And the
PCI endpoint devices that support advance interrupt
mechanism like MSI or MSI-X should not have an entry
with value 0 in "interrupt-map". This patch takes
care of this problem by avoiding redundant entries.
Signed-off-by: Sathyam Panda <sathyam.panda@xxxxxxx>
Reviewed-by: Vivek Kumar Gautam <vivek.gautam@xxxxxxx>
---
arm/pci.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arm/pci.c b/arm/pci.c
index 2251f62..e44e453 100644
--- a/arm/pci.c
+++ b/arm/pci.c
@@ -80,6 +80,16 @@ void pci__generate_fdt_nodes(void *fdt)
u8 irq = pci_hdr->irq_line;
u32 irq_flags = pci_hdr->irq_type;
+ /*
+ * Avoid adding entries in "interrupt-map" for devices that
+ * will be using advance interrupt mechanisms like MSI or
+ * MSI-X instead of legacy interrupt pins INTA#..INTD#
+ */
+ if (pin == 0) {
+ dev_hdr = device__next_dev(dev_hdr);
+ continue;
+ }
+
*entry = (struct of_interrupt_map_entry) {
.pci_irq_mask = {
.pci_addr = {
--
2.25.1
