drm/etnaviv: add missing MMU context put when reaping MMU mapping

When we forcefully evict a mapping from the the address space and thus the
MMU context, the MMU context is leaked, as the mapping no longer points to
it, so it doesn't get freed when the GEM object is destroyed. Add the
mssing context put to fix the leak.

Cc: stable@vger.kernel.org # 5.4
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Michael Walle <michael@walle.cc>
Tested-by: Marek Vasut <marex@denx.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
index dab1b58006d836dea6b6c5ea88a5fb3a3d5b57d4..9fb1a2aadbcb0fa9c740cc33cb68123a0a111895 100644 (file)
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
@@ -199,6 +199,7 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu_context *context,
                 */
                list_for_each_entry_safe(m, n, &list, scan_node) {
                        etnaviv_iommu_remove_mapping(context, m);
+                       etnaviv_iommu_context_put(m->context);
                        m->context = NULL;
                        list_del_init(&m->mmu_node);
                        list_del_init(&m->scan_node);