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drm/ttm/pool: Fix ttm_pool_alloc error path
[ Upstream commit 379989e ] When hitting an error, the error path forgot to unmap dma mappings and could call set_pages_wb() on already uncached pages. Fix this by introducing a common ttm_pool_free_range() function that does the right thing. v2: - Simplify that common function (Christian König) v3: - Rename that common function to ttm_pool_free_range() (Christian König) Fixes: d099fc8 ("drm/ttm: new TT backend allocation pool v3") Cc: Christian König <christian.koenig@amd.com> Cc: Dave Airlie <airlied@redhat.com> Cc: Christian Koenig <christian.koenig@amd.com> Cc: Huang Rui <ray.huang@amd.com> Cc: dri-devel@lists.freedesktop.org Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Christian König <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230404200650.11043-2-thomas.hellstrom@linux.intel.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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