linux-kernel - [PATCH v2 16/22] PCI: designware: update PCI config space remap function

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Date:   Mon, 27 Mar 2017 10:49:44 +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>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Joao Pinto <Joao.Pinto@...opsys.com>
Subject: [PATCH v2 16/22] PCI: designware: 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>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Jingoo Han <jingoohan1@...il.com>
Cc: Joao Pinto <Joao.Pinto@...opsys.com>
---
 drivers/pci/dwc/pcie-designware-host.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/dwc/pcie-designware-host.c b/drivers/pci/dwc/pcie-designware-host.c
index 5ba3349..d2dd228 100644
--- a/drivers/pci/dwc/pcie-designware-host.c
+++ b/drivers/pci/dwc/pcie-designware-host.c
@@ -338,8 +338,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	}
 
 	if (!pci->dbi_base) {
-		pci->dbi_base = devm_ioremap(dev, pp->cfg->start,
-					resource_size(pp->cfg));
+		pci->dbi_base = devm_ioremap_nopost(dev, pp->cfg->start,
+						    resource_size(pp->cfg));
 		if (!pci->dbi_base) {
 			dev_err(dev, "error with ioremap\n");
 			ret = -ENOMEM;
@@ -350,8 +350,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	pp->mem_base = pp->mem->start;
 
 	if (!pp->va_cfg0_base) {
-		pp->va_cfg0_base = devm_ioremap(dev, pp->cfg0_base,
-						pp->cfg0_size);
+		pp->va_cfg0_base = devm_ioremap_nopost(dev, pp->cfg0_base,
+						       pp->cfg0_size);
 		if (!pp->va_cfg0_base) {
 			dev_err(dev, "error with ioremap in function\n");
 			ret = -ENOMEM;
@@ -360,8 +360,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	}
 
 	if (!pp->va_cfg1_base) {
-		pp->va_cfg1_base = devm_ioremap(dev, pp->cfg1_base,
-						pp->cfg1_size);
+		pp->va_cfg1_base = devm_ioremap_nopost(dev, pp->cfg1_base,
+						       pp->cfg1_size);
 		if (!pp->va_cfg1_base) {
 			dev_err(dev, "error with ioremap\n");
 			ret = -ENOMEM;
-- 
2.10.0