UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

arm64: remove the dummy_dma_ops mapping_error method 

Just return DMA_MAPPING_ERROR from __dummy_map_page and let the core
dma-mapping code handle the rest.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2018-11-21 19:04:31 +01:00
parent fb1b53f16c
commit 52f0b3ee0b
1 changed files with 1 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm64/mm/dma-mapping.c
View File

@ -119,7 +119,7 @@ static dma_addr_t __dummy_map_page(struct device *dev, struct page *page,
enum dma_data_direction dir,
unsigned long attrs)
{
return 0;
return DMA_MAPPING_ERROR;
}
static void __dummy_unmap_page(struct device *dev, dma_addr_t dev_addr,
@ -154,11 +154,6 @@ static void __dummy_sync_sg(struct device *dev,
{
}
static int __dummy_mapping_error(struct device *hwdev, dma_addr_t dma_addr)
{
return 1;
}
static int __dummy_dma_supported(struct device *hwdev, u64 mask)
{
return 0;
@ -176,7 +171,6 @@ const struct dma_map_ops dummy_dma_ops = {
.sync_single_for_device = __dummy_sync_single,
.sync_sg_for_cpu = __dummy_sync_sg,
.sync_sg_for_device = __dummy_sync_sg,
.mapping_error = __dummy_mapping_error,
.dma_supported = __dummy_dma_supported,
};
EXPORT_SYMBOL(dummy_dma_ops);