6.10-stable review patch. If anyone has any objections, please let me know.
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From: Dave Airlie airlied@redhat.com
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@vger.kernel.org Signed-off-by: Dave Airlie airlied@redhat.com Reviewed-by: Michael J. Ruhl michael.j.ruhl@intel.com Acked-by: Daniel Vetter daniel.vetter@ffwll.ch Reviewed-by: Marco Pagani marpagan@redhat.com Link: https://patchwork.freedesktop.org/patch/msgid/20240715083551.777807-1-airlie... Signed-off-by: Maxime Ripard mripard@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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;