diff options
| -rw-r--r-- | lib/dma-debug.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/dma-debug.c b/lib/dma-debug.c index 8971370bfb16..60c57ec936db 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -1155,6 +1155,11 @@ static void check_unmap(struct dma_debug_entry *ref) dir2name[ref->direction]); } + /* + * Drivers should use dma_mapping_error() to check the returned + * addresses of dma_map_single() and dma_map_page(). + * If not, print this warning message. See Documentation/DMA-API.txt. + */ if (entry->map_err_type == MAP_ERR_NOT_CHECKED) { err_printk(ref->dev, entry, "DMA-API: device driver failed to check map error" |