From mboxrd@z Thu Jan 1 00:00:00 1970 From: lorenzo.pieralisi@arm.com (Lorenzo Pieralisi) Date: Mon, 27 Mar 2017 10:49:47 +0100 Subject: [PATCH v2 19/22] PCI: tegra: update PCI config space remap function In-Reply-To: <20170327094954.7162-1-lorenzo.pieralisi@arm.com> References: <20170327094954.7162-1-lorenzo.pieralisi@arm.com> Message-ID: <20170327094954.7162-20-lorenzo.pieralisi@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 Cc: Bjorn Helgaas Cc: Thierry Reding --- 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