[PATCH v3 4/6] powerpc/powernv/pci: Enable reassigning the bus numbers

[Sergey Miroshnichenko]

PowerNV doesn't depend on PCIe topology info from DT anymore, and now
it is able to enumerate the fabric and assign the bus numbers.

This is enabled by the pci=realloc command line switch.

Signed-off-by: Sergey Miroshnichenko <s.miroshnichenko at yadro.com>
---
 arch/powerpc/kernel/pci_dn.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 8bcf10fb13ad..863d00561c50 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -592,3 +592,15 @@ static void pci_dev_pdn_setup(struct pci_dev *pdev)
 	pdev->dev.archdata.pci_data = pdn;
 }
 DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, pci_dev_pdn_setup);
+
+char * __init pcibios_setup(char *str)
+{
+	if (!strncmp(str, "realloc=", 8)) {
+		if (!strncmp(str + 8, "on", 2))
+			pci_add_flags(PCI_REASSIGN_ALL_BUS);
+	} else if (!strncmp(str, "realloc", 7)) {
+		pci_add_flags(PCI_REASSIGN_ALL_BUS);
+	}
+
+	return str;
+}
-- 
2.17.1