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-rw-r--r--arch/powerpc/kernel/prom_parse.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 603dff3ad62a..17fcb4842fe5 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -914,6 +914,17 @@ int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
u8 pin;
int rc;
+ /* We need to first check if the PCI device has a PCI interrupt at all
+ * since we have cases where the device-node might expose non-PCI
+ * interrupts, but the device has no PCI interrupt to it
+ */
+ rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
+ if (rc != 0)
+ return rc;
+ /* No pin, exit */
+ if (pin == 0)
+ return -ENODEV;
+
/* Check if we have a device node, if yes, fallback to standard OF
* parsing
*/
@@ -925,12 +936,6 @@ int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
* interrupt spec. we assume #interrupt-cells is 1, which is standard
* for PCI. If you do different, then don't use that routine.
*/
- rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
- if (rc != 0)
- return rc;
- /* No pin, exit */
- if (pin == 0)
- return -ENODEV;
/* Now we walk up the PCI tree */
lspec = pin;