4.19-stable review patch. If anyone has any objections, please let me know.
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From: Lyude Paul lyude@redhat.com
commit 24199c5436f267399afed0c4f1f57663c0408f57 upstream.
Noticed this while working on redoing the reference counting scheme in the DP MST helpers. Nouveau doesn't attempt to call drm_dp_mst_topology_mgr_destroy() at all, which leaves it leaking all of the resources for drm_dp_mst_topology_mgr and it's children mstbs+ports.
Fixes: f479c0ba4a17 ("drm/nouveau/kms/nv50: initial support for DP 1.2 multi-stream") Signed-off-by: Lyude Paul lyude@redhat.com Cc: stable@vger.kernel.org # v4.10+ Signed-off-by: Ben Skeggs bskeggs@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/nouveau/dispnv50/disp.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c @@ -1226,6 +1226,7 @@ nv50_mstm_del(struct nv50_mstm **pmstm) { struct nv50_mstm *mstm = *pmstm; if (mstm) { + drm_dp_mst_topology_mgr_destroy(&mstm->mgr); kfree(*pmstm); *pmstm = NULL; }