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doc: Documentation/DMA-attributes.txt fix typo

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Fix some typos in Documentation/DMA-attributes.txt.

Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
Acked-by: Rob Landley <rob@landley.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Xishi Qiu 2013-08-30 17:39:28 +08:00 committed by Jiri Kosina
parent 0d7a0a8a74
commit bf038227a0
1 changed files with 3 additions and 3 deletions
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6
Documentation/DMA-attributes.txt
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@ -13,7 +13,7 @@ all pending DMA writes to complete, and thus provides a mechanism to
strictly order DMA from a device across all intervening busses and
bridges. This barrier is not specific to a particular type of
interconnect, it applies to the system as a whole, and so its
implementation must account for the idiosyncracies of the system all
implementation must account for the idiosyncrasies of the system all
the way from the DMA device to memory.
As an example of a situation where DMA_ATTR_WRITE_BARRIER would be
@ -60,7 +60,7 @@ such mapping is non-trivial task and consumes very limited resources
Buffers allocated with this attribute can be only passed to user space
by calling dma_mmap_attrs(). By using this API, you are guaranteeing
that you won't dereference the pointer returned by dma_alloc_attr(). You
can threat it as a cookie that must be passed to dma_mmap_attrs() and
can treat it as a cookie that must be passed to dma_mmap_attrs() and
dma_free_attrs(). Make sure that both of these also get this attribute
set on each call.
@ -82,7 +82,7 @@ to 'device' domain, what synchronizes CPU caches for the given region
(usually it means that the cache has been flushed or invalidated
depending on the dma direction). However, next calls to
dma_map_{single,page,sg}() for other devices will perform exactly the
same sychronization operation on the CPU cache. CPU cache sychronization
same synchronization operation on the CPU cache. CPU cache synchronization
might be a time consuming operation, especially if the buffers are
large, so it is highly recommended to avoid it if possible.
DMA_ATTR_SKIP_CPU_SYNC allows platform code to skip synchronization of