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