From: Dmitry Osipenko dmitry.osipenko@collabora.com
commit df4aaf015775221dde8a51ee09edb919981f091e upstream.
The vmapping of dma-buf may succeed, but DRM SHMEM rejects the IOMEM mapping, and thus, drm_gem_shmem_vmap_locked() should unvmap the IOMEM before erroring out.
Cc: stable@vger.kernel.org Fixes: 49a3f51dfeee ("drm/gem: Use struct dma_buf_map in GEM vmap ops and convert GEM backends") Signed-off-by: Dmitry Osipenko dmitry.osipenko@collabora.com Signed-off-by: Daniel Vetter daniel.vetter@ffwll.ch Link: https://patchwork.freedesktop.org/patch/msgid/20220630200058.1883506-2-dmitr... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/drm_gem_shmem_helper.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -302,6 +302,7 @@ static int drm_gem_shmem_vmap_locked(str ret = dma_buf_vmap(obj->import_attach->dmabuf, map); if (!ret) { if (WARN_ON(map->is_iomem)) { + dma_buf_vunmap(obj->import_attach->dmabuf, map); ret = -EIO; goto err_put_pages; }