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Commit 0569a88f authored by Vignesh R's avatar Vignesh R Committed by Mark Brown
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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: default avatarVignesh R <vigneshr@ti.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent d7e2ee25

drivers/spi/spi.c

+3 −1
Original line number Diff line number Diff line
@@ -717,9 +717,11 @@ static int spi_map_buf(struct spi_master *master, struct device *dev, 
	if (vmalloced_buf) {

		desc_len = min_t(int, max_seg_size, PAGE_SIZE);

		sgs = DIV_ROUND_UP(len + offset_in_page(buf), desc_len);

	} else {

	} else if (virt_addr_valid(buf)) {

		desc_len = min_t(int, max_seg_size, master->max_dma_len);

		sgs = DIV_ROUND_UP(len, desc_len);

	} else {

		return -EINVAL;

	}



	ret = sg_alloc_table(sgt, sgs, GFP_KERNEL);