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| author | Huang Shijie <shijie8@gmail.com> | 2013-12-18 23:41:00 +0800 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-01-27 21:55:03 -0800 |
| commit | 0ff76a920e3558307567b45aa0a91fb914924bfc (patch) | |
| tree | de9fcf55103af0f753dda69599989c3b63758112 /fs/nfsd/vfs.h | |
| parent | 06f216c83c25adadc231469d51ab133afdfe110a (diff) | |
| download | blackbird-op-linux-0ff76a920e3558307567b45aa0a91fb914924bfc.tar.gz blackbird-op-linux-0ff76a920e3558307567b45aa0a91fb914924bfc.zip | |
mtd: gpmi: add sanity check when mapping DMA for read_buf/write_buf
The buffer pointer passed from the upper layer may points to
a buffer in the stack or a buffer allocated by vmalloc, and etc..
This patch adds more sanity check to this buffer.
After this patch, if we meet a buffer which is allocated by vmalloc or
a buffer in the stack, we will use our own DMA buffer @data_buffer_dma
to do the DMA operations. If the buffer is not the cases above, we will
map it for DMA operations directly.
Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'fs/nfsd/vfs.h')
0 files changed, 0 insertions, 0 deletions
