Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH] dma-debug: make memory range checks more consistent | Date | Mon, 23 Mar 2009 15:35:08 +0100 |
| |
Impact: do range checks always when a page is mapped
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> --- lib/dma-debug.c | 13 ++++++++----- 1 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/lib/dma-debug.c b/lib/dma-debug.c index f9e6d38..1a99208 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -722,10 +722,11 @@ void debug_dma_map_page(struct device *dev, struct page *page, size_t offset, entry->size = size; entry->direction = direction; - if (map_single) { - void *addr = ((char *)page_address(page)) + offset; - + if (map_single) entry->type = dma_debug_single; + + if (!PageHighMem(page)) { + void *addr = ((char *)page_address(page)) + offset; check_for_stack(dev, addr); check_for_illegal_area(dev, addr, size); } @@ -779,8 +780,10 @@ void debug_dma_map_sg(struct device *dev, struct scatterlist *sg, entry->sg_call_ents = nents; entry->sg_mapped_ents = mapped_ents; - check_for_stack(dev, sg_virt(s)); - check_for_illegal_area(dev, sg_virt(s), s->length); + if (!PageHighMem(sg_page(s))) { + check_for_stack(dev, sg_virt(s)); + check_for_illegal_area(dev, sg_virt(s), s->length); + } add_dma_entry(entry); } -- 1.5.6.4
| |