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Groups > linux.kernel > #1609682

[PATCH v2 19/22] PCI: tegra: update PCI config space remap function

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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 correct memory mapping attributes to map config space
regions to enforce configuration space non-posted writes behaviour.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pci/host/pci-tegra.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index ed8a93f..ec72c3a 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -380,7 +380,7 @@ static struct tegra_pcie_bus *tegra_pcie_bus_alloc(struct tegra_pcie *pcie,
 						   unsigned int busnr)
 {
 	struct device *dev = pcie->dev;
-	pgprot_t prot = pgprot_device(PAGE_KERNEL);
+	pgprot_t prot = pgprot_nonposted(PAGE_KERNEL);
 	phys_addr_t cs = pcie->cs->start;
 	struct tegra_pcie_bus *bus;
 	unsigned int i;
@@ -1962,7 +1962,7 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
 		rp->pcie = pcie;
 		rp->np = port;
 
-		rp->base = devm_ioremap_resource(dev, &rp->regs);
+		rp->base = devm_ioremap_nopost_resource(dev, &rp->regs);
 		if (IS_ERR(rp->base))
 			return PTR_ERR(rp->base);
 
-- 
2.10.0

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Thread

[PATCH v2 00/22] PCI: fix config and I/O Address space memory mappings Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:00 +0200
  [PATCH v2 06/22] ARM: implement ioremap_nopost() interface Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
    Re: [PATCH v2 06/22] ARM: implement ioremap_nopost() interface Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-31 13:10 +0200
      Re: [PATCH v2 06/22] ARM: implement ioremap_nopost() interface Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-04-05 12:30 +0200
  [PATCH v2 21/22] PCI: keystone-dw: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 10/22] PCI: xilinx-nwl: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 11/22] PCI: spear13xx: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 19/22] PCI: tegra: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 12/22] PCI: rockchip: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 18/22] PCI: xgene: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 14/22] PCI: iproc-platform: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 22/22] PCI: versatile: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 17/22] PCI: armada8k: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 15/22] PCI: hisi: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 20/22] PCI: layerscape: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200
  [PATCH v2 13/22] PCI: qcom: update PCI config space remap function Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2017-03-27 12:10 +0200

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