Replace custom implementation of sg_alloc_table_from_buf() by a call to
sg_alloc_table_from_buf().
Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com>
---
drivers/spi/spi.c | 45 +++++----------------------------------------
1 file changed, 5 insertions(+), 40 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index de2f2f9..eed461d 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -705,49 +705,14 @@ static int spi_map_buf(struct spi_master *master, struct
device *dev,
struct sg_table *sgt, void *buf, size_t len,
enum dma_data_direction dir)
{
- const bool vmalloced_buf = is_vmalloc_addr(buf);
- unsigned int max_seg_size = dma_get_max_seg_size(dev);
- int desc_len;
- int sgs;
- struct page *vm_page;
- void *sg_buf;
- size_t min;
- int i, ret;
-
- 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 {
- desc_len = min_t(int, max_seg_size, master->max_dma_len);
- sgs = DIV_ROUND_UP(len, desc_len);
- }
+ struct sg_constraints constraints = { };
+ int ret;
- ret = sg_alloc_table(sgt, sgs, GFP_KERNEL);
- if (ret != 0)
+ constraints.max_segment_size = dma_get_max_seg_size(dev);
+ ret = sg_alloc_table_from_buf(sgt, buf, len, &constraints, GFP_KERNEL);
+ if (ret)
return ret;
- for (i = 0; i < sgs; i++) {
-
- if (vmalloced_buf) {
- min = min_t(size_t,
- len, desc_len - offset_in_page(buf));
- vm_page = vmalloc_to_page(buf);
- if (!vm_page) {
- sg_free_table(sgt);
- return -ENOMEM;
- }
- sg_set_page(&sgt->sgl[i], vm_page,
- min, offset_in_page(buf));
- } else {
- min = min_t(size_t, len, desc_len);
- sg_buf = buf;
- sg_set_buf(&sgt->sgl[i], sg_buf, min);
- }
-
- buf += min;
- len -= min;
- }
-
ret = dma_map_sg(dev, sgt->sgl, sgt->nents, dir);
if (!ret)
ret = -ENOMEM;
--
2.5.0
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