[PATCH 15/18] Delayed unicore32 setup of PCI IRQs to bus scan time

[matt@masarand.com]

From: Matthew Minter <matt@masarand.com>

PCI IRQs are currently assigned during pci_common_init, this is only run
at boot time so devices hot-plugged after boot will not be allocated an IRQ.
this is fixed here by defering the assignment untill the device enable code,
instead registering the function pointer at boot time.

Signed-off-by: Matthew Minter <matt@masarand.com>

---
 arch/unicore32/kernel/pci.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c
index 374a055..6a9da80 100644
--- a/arch/unicore32/kernel/pci.c
+++ b/arch/unicore32/kernel/pci.c
@@ -101,7 +101,7 @@ void pci_puv3_preinit(void)
 	writel(readl(PCIBRI_CMD) | PCIBRI_CMD_IO | PCIBRI_CMD_MEM, PCIBRI_CMD);
 }
 
-static int __init pci_puv3_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+static int pci_puv3_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 {
 	if (dev->bus->number == 0) {
 #ifdef CONFIG_ARCH_FPGA /* 4 pci slots */
@@ -263,8 +263,6 @@ static int __init pci_common_init(void)
 	if (!puv3_bus)
 		panic("PCI: unable to scan bus!");
 
-	pci_fixup_irqs(pci_common_swizzle, pci_puv3_map_irq);
-
 	if (!pci_has_flag(PCI_PROBE_ONLY)) {
 		/*
 		 * Size the bridge windows.
@@ -281,6 +279,13 @@ static int __init pci_common_init(void)
 }
 subsys_initcall(pci_common_init);
 
+int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
+{
+	bridge->swizzle_irq = pci_common_swizzle;
+	bridge->map_irq = pci_puv3_map_irq;
+	return 0;
+}
+
 char * __init pcibios_setup(char *str)
 {
 	if (!strcmp(str, "debug")) {
-- 
2.1.0