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Documentation: correct parameter error for dma_mapping_error

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dma_mapping_error takes two parameters, but some of examples
in Documentation/DMA-API-HOWTO.txt just takes one. So correct
it.

Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Liu Hua
2014-09-18 12:15:28 +08:00
committed by Jiri Kosina
parent 53007a7bfe
commit b2dd83b377
1 changed files with 3 additions and 3 deletions
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6
Documentation/DMA-API-HOWTO.txt
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@@ -531,7 +531,7 @@ To map a single region, you do:
size_t size = buffer->len; size_t size = buffer->len;
dma_handle = dma_map_single(dev, addr, size, direction); dma_handle = dma_map_single(dev, addr, size, direction);
if (dma_mapping_error(dma_handle)) { if (dma_mapping_error(dev, dma_handle)) {
/* /*
* reduce current DMA mapping usage, * reduce current DMA mapping usage,
* delay and try again later or * delay and try again later or
@@ -588,7 +588,7 @@ Specifically:
size_t size = buffer->len; size_t size = buffer->len;
dma_handle = dma_map_page(dev, page, offset, size, direction); dma_handle = dma_map_page(dev, page, offset, size, direction);
if (dma_mapping_error(dma_handle)) { if (dma_mapping_error(dev, dma_handle)) {
/* /*
* reduce current DMA mapping usage, * reduce current DMA mapping usage,
* delay and try again later or * delay and try again later or
@@ -689,7 +689,7 @@ to use the dma_sync_*() interfaces.
dma_addr_t mapping; dma_addr_t mapping;
mapping = dma_map_single(cp->dev, buffer, len, DMA_FROM_DEVICE); mapping = dma_map_single(cp->dev, buffer, len, DMA_FROM_DEVICE);
if (dma_mapping_error(dma_handle)) { if (dma_mapping_error(cp->dev, dma_handle)) {
/* /*
* reduce current DMA mapping usage, * reduce current DMA mapping usage,
* delay and try again later or * delay and try again later or