[PATCH v2 3/4] PCI: dwc: Reduce DT reads by allocating host bridge via DWC glue driver

[Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>]

Allow DWC glue drivers to allocate the host bridge, avoiding redundant
device tree reads primarily in dw_pcie_ecam_supported().

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 4e07fefe12e1..c3f464f128f0 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -479,8 +479,8 @@ int dw_pcie_host_init(struct dw_pcie_rp *pp)
 	struct device *dev = pci->dev;
 	struct device_node *np = dev->of_node;
 	struct platform_device *pdev = to_platform_device(dev);
+	struct pci_host_bridge *bridge = pp->bridge;
 	struct resource_entry *win;
-	struct pci_host_bridge *bridge;
 	struct resource *res;
 	int ret;
 
@@ -492,11 +492,12 @@ int dw_pcie_host_init(struct dw_pcie_rp *pp)
 		return -ENODEV;
 	}
 
-	bridge = devm_pci_alloc_host_bridge(dev, 0);
-	if (!bridge)
-		return -ENOMEM;
-
-	pp->bridge = bridge;
+	if (!pp->bridge) {
+		bridge = devm_pci_alloc_host_bridge(dev, 0);
+		if (!bridge)
+			return -ENOMEM;
+		pp->bridge = bridge;
+	}
 
 	pp->cfg0_size = resource_size(res);
 	pp->cfg0_base = res->start;

-- 
2.34.1