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 --- drivers/gpu/drm/ttm/ttm_bo_util.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)

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 @@ int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,

*virtual = NULL; ret = ttm_mem_io_reserve(bdev, mem); - if (ret) + if (ret || !mem->bus.is_iomem) return ret;

if (mem->bus.addr) {