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drivers: remove force dma flag from buses

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With each bus implementing its own DMA configuration callback, there is no
need for bus to explicitly set the force_dma flag.  Modify the
of_dma_configure function to accept an input parameter which specifies if
implicit DMA configuration is required when it is not described by the
firmware.

Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>  # PCI parts
Reviewed-by: Rob Herring <robh@kernel.org>
[hch: tweaked the changelog a bit]
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
2018-05-03 16:25:08 +02:00
parent 07397df29e
commit 3d6ce86ee7
10 changed files with 17 additions and 19 deletions
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3
drivers/pci/pci-driver.c
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@@ -1595,7 +1595,7 @@ static int pci_dma_configure(struct device *dev)
if (IS_ENABLED(CONFIG_OF) && bridge->parent &&
bridge->parent->of_node) {
ret = of_dma_configure(dev, bridge->parent->of_node);
ret = of_dma_configure(dev, bridge->parent->of_node, true);
} else if (has_acpi_companion(bridge)) {
struct acpi_device *adev = to_acpi_device_node(bridge->fwnode);
enum dev_dma_attr attr = acpi_get_dma_attr(adev);
@@ -1621,7 +1621,6 @@ struct bus_type pci_bus_type = {
.pm = PCI_PM_OPS_PTR,
.num_vf = pci_bus_num_vf,
.dma_configure = pci_dma_configure,
.force_dma = true,
};
EXPORT_SYMBOL(pci_bus_type);