openwrt/target/linux/generic/backport-5.10/840-0002-PCI-iproc-Fix-BCMA-probe-resource-handling.patch

From: Rob Herring <robh@kernel.org>
Date: Tue, 3 Aug 2021 15:56:56 -0600
Subject: [PATCH] PCI: iproc: Fix BCMA probe resource handling
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In commit 7ef1c871da16 ("PCI: iproc: Use
pci_parse_request_of_pci_ranges()"), calling
devm_request_pci_bus_resources() was dropped from the common iProc
probe code, but is still needed for BCMA bus probing. Without it, there
will be lots of warnings like this:

pci 0000:00:00.0: BAR 8: no space for [mem size 0x00c00000]
pci 0000:00:00.0: BAR 8: failed to assign [mem size 0x00c00000]

Add back calling devm_request_pci_bus_resources() and adding the
resources to pci_host_bridge.windows for BCMA bus probe.

Fixes: 7ef1c871da16 ("PCI: iproc: Use pci_parse_request_of_pci_ranges()")
Reported-by: Rafał Miłecki <zajec5@gmail.com>
Cc: Srinath Mannam <srinath.mannam@broadcom.com>
Cc: Roman Bacik <roman.bacik@broadcom.com>
Cc: Bharat Gooty <bharat.gooty@broadcom.com>
Cc: Abhishek Shah <abhishek.shah@broadcom.com>
Cc: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Cc: Ray Jui <ray.jui@broadcom.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: BCM Kernel Feedback <bcm-kernel-feedback-list@broadcom.com>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: "Krzysztof Wilczyński" <kw@linux.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/pci/controller/pcie-iproc-bcma.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

--- a/drivers/pci/controller/pcie-iproc-bcma.c
+++ b/drivers/pci/controller/pcie-iproc-bcma.c
@@ -35,7 +35,6 @@ static int iproc_pcie_bcma_probe(struct
 {
 	struct device *dev = &bdev->dev;
 	struct iproc_pcie *pcie;
-	LIST_HEAD(resources);
 	struct pci_host_bridge *bridge;
 	int ret;
 
@@ -60,19 +59,16 @@ static int iproc_pcie_bcma_probe(struct
 	pcie->mem.end = bdev->addr_s[0] + SZ_128M - 1;
 	pcie->mem.name = "PCIe MEM space";
 	pcie->mem.flags = IORESOURCE_MEM;
-	pci_add_resource(&resources, &pcie->mem);
+	pci_add_resource(&bridge->windows, &pcie->mem);
+	ret = devm_request_pci_bus_resources(dev, &bridge->windows);
+	if (ret)
+		return ret;
 
 	pcie->map_irq = iproc_pcie_bcma_map_irq;
 
-	ret = iproc_pcie_setup(pcie, &resources);
-	if (ret) {
-		dev_err(dev, "PCIe controller setup failed\n");
-		pci_free_resource_list(&resources);
-		return ret;
-	}
-
 	bcma_set_drvdata(bdev, pcie);
-	return 0;
+
+	return iproc_pcie_setup(pcie, &bridge->windows);
 }
 
 static void iproc_pcie_bcma_remove(struct bcma_device *bdev)