diff options
| author | Huang Shijie <[email protected]> | 2013-12-18 15:41:00 +0000 |
|---|---|---|
| committer | Brian Norris <[email protected]> | 2014-01-28 05:55:03 +0000 |
| commit | 0ff76a920e3558307567b45aa0a91fb914924bfc (patch) | |
| tree | de9fcf55103af0f753dda69599989c3b63758112 /lib | |
| parent | mtd: gpmi: allocate a proper buffer for non ECC read/write (diff) | |
| download | kernel-0ff76a920e3558307567b45aa0a91fb914924bfc.tar.gz kernel-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 <[email protected]>
Signed-off-by: Brian Norris <[email protected]>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions