diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2018-12-06 13:20:49 -0800 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-12-13 21:06:13 +0100 |
| commit | e5361ca29f2fea345c08d2b5cb5e3b1840cbafb8 (patch) | |
| tree | 697be029cf1427e187d1547d376c719b185b632b /drivers/base/platform.c | |
| parent | 90ac706e98fcb24fb0b0a259558987f33cc2f0f6 (diff) | |
| download | linux-e5361ca29f2fea345c08d2b5cb5e3b1840cbafb8.tar.gz | |
ACPI / scan: Refactor _CCA enforcement
Rather than checking the DMA attribute at each callsite, just pass it
through for acpi_dma_configure() to handle directly. That can then deal
with the relatively exceptional DEV_DMA_NOT_SUPPORTED case by explicitly
installing dummy DMA ops instead of just skipping setup entirely. This
will then free up the dev->dma_ops == NULL case for some valuable
fastpath optimisations.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'drivers/base/platform.c')
| -rw-r--r-- | drivers/base/platform.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index eae841935a451..c1ddf191711e3 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -1138,8 +1138,7 @@ int platform_dma_configure(struct device *dev) ret = of_dma_configure(dev, dev->of_node, true); } else if (has_acpi_companion(dev)) { attr = acpi_get_dma_attr(to_acpi_device_node(dev->fwnode)); - if (attr != DEV_DMA_NOT_SUPPORTED) - ret = acpi_dma_configure(dev, attr); + ret = acpi_dma_configure(dev, attr); } return ret; |