[PATCH 2/2] rcar-pcie: set host bridge's DMA mask
From: nikita.yoush@cogentembedded.com (Nikita Yushchenko)
Date: 2016-12-29 20:45:23
Also in:
linux-pci, linux-renesas-soc, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
This gives platform DMA mapping code a chance to disallow setting device DMA mask to something that host bridge can't support. Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com> --- drivers/pci/host/pcie-rcar.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c
index aca85be..b1edc3c 100644
--- a/drivers/pci/host/pcie-rcar.c
+++ b/drivers/pci/host/pcie-rcar.c@@ -451,6 +451,7 @@ static int rcar_pcie_enable(struct rcar_pcie *pcie) { struct device *dev = pcie->dev; struct pci_bus *bus, *child; + struct pci_host_bridge *bridge; LIST_HEAD(res); /* Try setting 5 GT/s link speed */
@@ -480,6 +481,10 @@ static int rcar_pcie_enable(struct rcar_pcie *pcie) list_for_each_entry(child, &bus->children, node) pcie_bus_configure_settings(child); + bridge = pci_find_host_bridge(bus); + bridge->dev.coherent_dma_mask = DMA_BIT_MASK(32); + bridge->dev.dma_mask = &bridge->dev.coherent_dma_mask; + pci_bus_add_devices(bus); return 0;
--
2.1.4