Merge remote-tracking branch 'spi/topic/dma' into spi-next

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 0b2bbf144460..89158c639e29 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -702,6 +702,7 @@ static int spi_map_buf(struct spi_master *master, struct device *dev,
                        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;
@@ -710,10 +711,10 @@ static int spi_map_buf(struct spi_master *master, struct device *dev,
         int i, ret;
 
         if (vmalloced_buf) {
-                desc_len = PAGE_SIZE;
+                desc_len = min_t(int, max_seg_size, PAGE_SIZE);
                 sgs = DIV_ROUND_UP(len + offset_in_page(buf), desc_len);
         } else {
-                desc_len = master->max_dma_len;
+                desc_len = min_t(int, max_seg_size, master->max_dma_len);
                 sgs = DIV_ROUND_UP(len, desc_len);
         }
 
@@ -739,7 +740,6 @@ static int spi_map_buf(struct spi_master *master, struct device *dev,
                         sg_set_buf(&sgt->sgl[i], sg_buf, min);
                 }
 
-
                 buf += min;
                 len -= min;
         }