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Commit b2dd83b3 authored by Liu Hua's avatar Liu Hua Committed by Jiri Kosina
Browse files

Documentation: correct parameter error for dma_mapping_error 



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: default avatarLiu Hua <sdu.liu@huawei.com>
Acked-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 53007a7b

Documentation/DMA-API-HOWTO.txt

+3 −3
Original line number Diff line number Diff line
@@ -531,7 +531,7 @@ To map a single region, you do: 
	size_t size = buffer->len;



	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,

		 * delay and try again later or
@@ -588,7 +588,7 @@ Specifically: 
	size_t size = buffer->len;



	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,

		 * delay and try again later or
@@ -689,7 +689,7 @@ to use the dma_sync_*() interfaces. 
		dma_addr_t mapping;



		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,

			 * delay and try again later or