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| author | Robin Murphy <robin.murphy@arm.com> | 2018-12-06 22:20:49 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-12-13 21:06:13 +0100 |
| commit | e5361ca29f2fea345c08d2b5cb5e3b1840cbafb8 (patch) | |
| tree | 697be029cf1427e187d1547d376c719b185b632b /drivers/char/mem.c | |
| parent | dma-mapping: factor out dummy DMA ops (diff) | |
| download | linux-e5361ca29f2fea345c08d2b5cb5e3b1840cbafb8.tar.xz linux-e5361ca29f2fea345c08d2b5cb5e3b1840cbafb8.zip | |
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/char/mem.c')
0 files changed, 0 insertions, 0 deletions