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

commit f2faea8b64125852fa9acc6771c07fc0311a039b upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lucas Stach 2021-08-20 22:18:30 +02:00 committed by Greg Kroah-Hartman
parent b2ec1e6f1d
commit 15b674b1e5
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/etnaviv/etnaviv_mmu.c
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@ -204,6 +204,7 @@ 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);