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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2014-11-20 10:42:40 +0000 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2014-12-04 12:41:51 +0000 |
| commit | 2e2a7817fdb6304f8c95c29dae0c93e2727240f4 (patch) | |
| tree | 88735f6ed6157a9b2329d35c3d9576a10b4c9ff7 /arch/arm/xen | |
| parent | 3d5391ac6f5e3cb1ab01e23851140d3f6e9ab573 (diff) | |
| download | linux-2e2a7817fdb6304f8c95c29dae0c93e2727240f4.tar.bz2 | |
xen/arm: use is_device_dma_coherent
Use is_device_dma_coherent to check whether we need to issue cache
maintenance operations rather than checking on the existence of a
particular dma_ops function for the device.
This is correct because coherent devices don't need cache maintenance
operations - arm_coherent_dma_ops does not set the hooks that we
were previously checking for existance.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Diffstat (limited to 'arch/arm/xen')
| -rw-r--r-- | arch/arm/xen/mm32.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/xen/mm32.c b/arch/arm/xen/mm32.c index 5bb8391188c8..3ce9dc1efb0c 100644 --- a/arch/arm/xen/mm32.c +++ b/arch/arm/xen/mm32.c @@ -48,7 +48,7 @@ void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle, struct dma_attrs *attrs) { - if (!__generic_dma_ops(hwdev)->unmap_page) + if (is_device_dma_coherent(hwdev)) return; if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs)) return; @@ -59,7 +59,7 @@ void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle, void __xen_dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { - if (!__generic_dma_ops(hwdev)->sync_single_for_cpu) + if (is_device_dma_coherent(hwdev)) return; __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir); } @@ -67,7 +67,7 @@ void __xen_dma_sync_single_for_cpu(struct device *hwdev, void __xen_dma_sync_single_for_device(struct device *hwdev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { - if (!__generic_dma_ops(hwdev)->sync_single_for_device) + if (is_device_dma_coherent(hwdev)) return; __xen_dma_page_cpu_to_dev(hwdev, handle, size, dir); } |