Hi Rafael, On 8/26/15 06:48, Rafael J. Wysocki wrote:
On Wednesday, August 26, 2015 12:33:29 AM Suravee Suthikulpanit wrote:This patch adds support for setting up PCI device DMA coherency from ACPI _CCA object that should normally be specified in the DSDT node of its PCI host bridge. Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx> CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> CC: Catalin Marinas <catalin.marinas@xxxxxxx> CC: Rob Herring <robh+dt@xxxxxxxxxx> CC: Will Deacon <will.deacon@xxxxxxx> CC: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> CC: Murali Karicheri <m-karicheri2@xxxxxx> --- drivers/pci/probe.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 4de6594..2fd2a60 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1551,17 +1551,22 @@ static void pci_init_capabilities(struct pci_dev *dev) * @dev: ptr to pci_dev struct of the PCI device * * Function to update PCI devices's DMA configuration using the same - * info from the OF node of host bridge's parent (if any). + * info from the OF node or ACPI node of host bridge's parent (if any). */ static void pci_dma_configure(struct pci_dev *dev) { struct device *bridge = pci_get_host_bridge_device(dev); if (IS_ENABLED(CONFIG_OF) && dev->dev.of_node) { - if (!bridge->parent) - return; - - of_dma_configure(&dev->dev, bridge->parent->of_node); + if (bridge->parent) + of_dma_configure(&dev->dev, + bridge->parent->of_node); + } else if (has_acpi_companion(bridge)) { + struct acpi_device *adev = to_acpi_node(bridge->fwnode); + int coherent = acpi_check_dma_coherency(adev); + + if (-1 != coherent)The ordering of this check is somewhat unusual.
I'll fix this. Thanks, Suravee -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
