diff options
author | Maxime Chevallier <maxime.chevallier@bootlin.com> | 2018-03-02 15:55:09 +0100 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2018-03-02 17:31:39 +0000 |
commit | ce99319a182fe766be67f96338386f3ec73e321c (patch) | |
tree | 91838b4a8050a41e4aada0fd88bee30cde61b379 /virt | |
parent | 7928b2cbe55b2a410a0f5c1f154610059c57b1b2 (diff) |
spi: Fix scatterlist elements size in spi_map_buf
When SPI transfers can be offloaded using DMA, the SPI core need to
build a scatterlist to make sure that the buffer to be transferred is
dma-able.
This patch fixes the scatterlist entry size computation in the case
where the maximum acceptable scatterlist entry supported by the DMA
controller is less than PAGE_SIZE, when the buffer is vmalloced.
For each entry, the actual size is given by the minimum between the
desc_len (which is the max buffer size supported by the DMA controller)
and the remaining buffer length until we cross a page boundary.
Fixes: 65598c13fd66 ("spi: Fix per-page mapping of unaligned vmalloc-ed buffer")
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Diffstat (limited to 'virt')
0 files changed, 0 insertions, 0 deletions