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Merge remote-tracking branch 'spi/fix/dma' into spi-linus

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Mark Brown 2018-04-02 15:56:20 +01:00
parent 0adb32858b ce99319a18
commit 43ff2dcef0
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1 changed files with 8 additions and 2 deletions
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10
drivers/spi/spi.c
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@ -779,8 +779,14 @@ static int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
for (i = 0; i < sgs; i++) {
if (vmalloced_buf || kmap_buf) {
min = min_t(size_t,
len, desc_len - offset_in_page(buf));
/*
* Next scatterlist entry size is the minimum between
* the desc_len and the remaining buffer length that
* fits in a page.
*/
min = min_t(size_t, desc_len,
min_t(size_t, len,
PAGE_SIZE - offset_in_page(buf)));
if (vmalloced_buf)
vm_page = vmalloc_to_page(buf);
else