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spi: return error if kmap'd buffers passed to spi_map_buf()
Current spi_map_buf() implementation supports creates sg_table for vmalloc'd and kmalloc'd buffers. Therefore return error if kmap'd buffer (or any other buffer) is passed to spi_map_buf(). Signed-off-by: Vignesh R <vigneshr@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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1 changed files with 3 additions and 1 deletions
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@ -717,9 +717,11 @@ static int spi_map_buf(struct spi_master *master, struct device *dev,
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if (vmalloced_buf) {
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desc_len = min_t(int, max_seg_size, PAGE_SIZE);
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sgs = DIV_ROUND_UP(len + offset_in_page(buf), desc_len);
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} else {
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} else if (virt_addr_valid(buf)) {
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desc_len = min_t(int, max_seg_size, master->max_dma_len);
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sgs = DIV_ROUND_UP(len, desc_len);
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} else {
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return -EINVAL;
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}
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ret = sg_alloc_table(sgt, sgs, GFP_KERNEL);
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