From: Dave Airlie <airlied@xxxxxxxxxx>
commit 62b45bab010d1b0cea6166f818f1cd0666a6d8d8 upstream.
The test here creates an sg table, but never maps it, when
we get to drm_gem_shmem_free, the helper tries to unmap and this
causes warnings on some platforms and debug kernels.
This also sets a 64-bit dma mask, as I see an swiotlb warning if I
stick with the default 32-bit one.
Fixes: 93032ae634d4 ("drm/test: add a test suite for GEM objects backed by shmem")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@xxxxxxxxx>
Acked-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Reviewed-by: Marco Pagani <marpagan@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240715083551.777807-1-airlied@xxxxxxxxx
Signed-off-by: Maxime Ripard <mripard@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/tests/drm_gem_shmem_test.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/drivers/gpu/drm/tests/drm_gem_shmem_test.c
+++ b/drivers/gpu/drm/tests/drm_gem_shmem_test.c
@@ -102,6 +102,17 @@ static void drm_gem_shmem_test_obj_creat
sg_init_one(sgt->sgl, buf, TEST_SIZE);
+ /*
+ * Set the DMA mask to 64-bits and map the sgtables
+ * otherwise drm_gem_shmem_free will cause a warning
+ * on debug kernels.
+ */
+ ret = dma_set_mask(drm_dev->dev, DMA_BIT_MASK(64));
+ KUNIT_ASSERT_EQ(test, ret, 0);
+
+ ret = dma_map_sgtable(drm_dev->dev, sgt, DMA_BIDIRECTIONAL, 0);
+ KUNIT_ASSERT_EQ(test, ret, 0);
+
/* Init a mock DMA-BUF */
buf_mock.size = TEST_SIZE;
attach_mock.dmabuf = &buf_mock;
Patches currently in stable-queue which might be from airlied@xxxxxxxxxx are
queue-6.10/drm-test-fix-the-gem-shmem-test-to-map-the-sg-table.patch
