[PATCH] drivers/misc/cxl: Avoid unnecessary error message

[Gavin Shan]

The following error message was observed. It's complaining M32
memory window is missed on virtual PHB, which is a bit confusing.
The problem is the memory windows are never updated from its
device-tree node.

   PCI: Memory resource 0 not set for host bridge \
   /pciex at 3fffe40000000/pci at 0/device at 0

This avoids the unnecessary error message by updating the PHB's
memory windows with pci_process_bridge_OF_ranges(). The function
is exported as well.

Signed-off-by: Gavin Shan <gwshan at linux.vnet.ibm.com>
---
 arch/powerpc/kernel/pci-common.c | 1 +
 drivers/misc/cxl/vphb.c          | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 74bec54..b5ffd8a 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -824,6 +824,7 @@ void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 		}
 	}
 }
+EXPORT_SYMBOL_GPL(pci_process_bridge_OF_ranges);
 
 /* Decide whether to display the domain number in /proc */
 int pci_proc_domain(struct pci_bus *bus)
diff --git a/drivers/misc/cxl/vphb.c b/drivers/misc/cxl/vphb.c
index 3519ace..8382761 100644
--- a/drivers/misc/cxl/vphb.c
+++ b/drivers/misc/cxl/vphb.c
@@ -215,6 +215,15 @@ int cxl_pci_vphb_add(struct cxl_afu *afu)
 	if (!phb)
 		return -ENODEV;
 
+	/* Parse IO and memory ranges */
+	if (dev_is_pci(parent)) {
+		struct pci_dev *pdev;
+
+		pdev = to_pci_dev(parent);
+		vphb_dn = pnv_pci_get_phb_node(pdev);
+		pci_process_bridge_OF_ranges(phb, vphb_dn, false);
+	}
+
 	/* Setup parent in sysfs */
 	phb->parent = parent;
 
-- 
2.7.4