linux-kernel - [PATCH v2 15/22] PCI: hisi: update PCI config space remap function

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Date:   Mon, 27 Mar 2017 10:49:43 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     linux-pci@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Gabriele Paoloni <gabriele.paoloni@...wei.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Zhou Wang <wangzhou1@...ilicon.com>
Subject: [PATCH v2 15/22] PCI: hisi: update PCI config space remap function

PCI configuration space should be mapped with a memory region type that
generates on the CPU host bus non-posted write transations. Update the
driver to use the devm_ioremap_nopost* interface to make sure the correct
memory mappings for PCI configuration space are used.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Signed-off-by: Gabriele Paoloni <gabriele.paoloni@...wei.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Zhou Wang <wangzhou1@...ilicon.com>
---
 drivers/pci/dwc/pcie-hisi.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/dwc/pcie-hisi.c b/drivers/pci/dwc/pcie-hisi.c
index fd66a31..66a91b2 100644
--- a/drivers/pci/dwc/pcie-hisi.c
+++ b/drivers/pci/dwc/pcie-hisi.c
@@ -99,7 +99,7 @@ static int hisi_pcie_init(struct pci_config_window *cfg)
 		return -ENOMEM;
 	}
 
-	reg_base = devm_ioremap(dev, res->start, resource_size(res));
+	reg_base = devm_ioremap_nopost(dev, res->start, resource_size(res));
 	if (!reg_base)
 		return -ENOMEM;
 
@@ -296,10 +296,9 @@ static int hisi_pcie_probe(struct platform_device *pdev)
 	}
 
 	reg = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rc_dbi");
-	pci->dbi_base = devm_ioremap_resource(dev, reg);
+	pci->dbi_base = devm_ioremap_nopost_resource(dev, reg);
 	if (IS_ERR(pci->dbi_base))
 		return PTR_ERR(pci->dbi_base);
-
 	platform_set_drvdata(pdev, hisi_pcie);
 
 	ret = hisi_add_pcie_port(hisi_pcie, pdev);
@@ -360,7 +359,7 @@ static int hisi_pcie_platform_init(struct pci_config_window *cfg)
 		return -EINVAL;
 	}
 
-	reg_base = devm_ioremap(dev, res->start, resource_size(res));
+	reg_base = devm_ioremap_nopost(dev, res->start, resource_size(res));
 	if (!reg_base)
 		return -ENOMEM;
 
-- 
2.10.0