drm/ttm: fix, avoid iomapping system memory
If the memory is not iomem we should not try to
ioremap it. Should fix :
https://bugs.freedesktop.org/show_bug.cgi?id=27822
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Tested-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index a37a948..13012a1 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -113,7 +113,7 @@
*virtual = NULL;
ret = ttm_mem_io_reserve(bdev, mem);
- if (ret)
+ if (ret || !mem->bus.is_iomem)
return ret;
if (mem->bus.addr) {