[PATCH] drm/radeon: use the dummy page for GART if needed

[Christian König]

Imported BOs don't have a pagelist any more.

Signed-off-by: Christian König <christian.koenig at amd.com>
Fixes: 0575ff3d33cd ("drm/radeon: stop using pages with drm_prime_sg_to_page_addr_arrays v2")
CC: stable at vger.kernel.org # 5.12
---
 drivers/gpu/drm/radeon/radeon_gart.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c
index 3808a753127b..04109a2a6fd7 100644
--- a/drivers/gpu/drm/radeon/radeon_gart.c
+++ b/drivers/gpu/drm/radeon/radeon_gart.c
@@ -301,7 +301,8 @@ int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
 	p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 
 	for (i = 0; i < pages; i++, p++) {
-		rdev->gart.pages[p] = pagelist[i];
+		rdev->gart.pages[p] = pagelist ? pagelist[i] :
+			rdev->dummy_page.page;
 		page_base = dma_addr[i];
 		for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 			page_entry = radeon_gart_get_page_entry(page_base, flags);
-- 
2.25.1