dma-debug: add comment for failed to check map error
Add comment for failure to check a map error to help driver developers. Link: http://lkml.kernel.org/r/1484622289-22085-1-git-send-email-miles.chen@mediatek.com Signed-off-by: Miles Chen <miles.chen@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
f42003917b
commit
a5759b2bff
@ -1155,6 +1155,11 @@ static void check_unmap(struct dma_debug_entry *ref)
|
|||||||
dir2name[ref->direction]);
|
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) {
|
if (entry->map_err_type == MAP_ERR_NOT_CHECKED) {
|
||||||
err_printk(ref->dev, entry,
|
err_printk(ref->dev, entry,
|
||||||
"DMA-API: device driver failed to check map error"
|
"DMA-API: device driver failed to check map error"
|
||||||
|
Loading…
Reference in New Issue
Block a user