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authorMaxime Chevallier <maxime.chevallier@bootlin.com>2018-03-02 15:55:09 +0100
committerMark Brown <broonie@kernel.org>2018-03-02 17:31:39 +0000
commitce99319a182fe766be67f96338386f3ec73e321c (patch)
tree91838b4a8050a41e4aada0fd88bee30cde61b379 /virt
parent7928b2cbe55b2a410a0f5c1f154610059c57b1b2 (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