Documentation: correct parameter error for dma_mapping_error

dma_mapping_error takes two parameters, but some of examples
in Documentation/DMA-API-HOWTO.txt just takes one. So correct
it.

Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 3 insertions, 3 deletions

diff --git a/Documentation/DMA-API-HOWTO.txt b/Documentation/DMA-API-HOWTO.txt
index dcbbe3602d78..0f7afb2bb442 100644
--- a/Documentation/DMA-API-HOWTO.txt
+++ b/Documentation/DMA-API-HOWTO.txt
@@ -531,7 +531,7 @@ To map a single region, you do:
         size_t size = buffer->len;
 
         dma_handle = dma_map_single(dev, addr, size, direction);
-        if (dma_mapping_error(dma_handle)) {
+        if (dma_mapping_error(dev, dma_handle)) {
                 /*
                  * reduce current DMA mapping usage,
                  * delay and try again later or
@@ -588,7 +588,7 @@ Specifically:
         size_t size = buffer->len;
 
         dma_handle = dma_map_page(dev, page, offset, size, direction);
-        if (dma_mapping_error(dma_handle)) {
+        if (dma_mapping_error(dev, dma_handle)) {
                 /*
                  * reduce current DMA mapping usage,
                  * delay and try again later or
@@ -689,7 +689,7 @@ to use the dma_sync_*() interfaces.
                 dma_addr_t mapping;
 
                 mapping = dma_map_single(cp->dev, buffer, len, DMA_FROM_DEVICE);
-                if (dma_mapping_error(dma_handle)) {
+                if (dma_mapping_error(cp->dev, dma_handle)) {
                         /*
                          * reduce current DMA mapping usage,
                          * delay and try again later or