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| author | David S. Miller <davem@davemloft.net> | 2018-11-19 10:55:00 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-11-19 10:55:00 -0800 |
| commit | f2be6d710d25be7d8d13f49f713d69dea9c71d57 (patch) | |
| tree | 1b3dde663a53e7f4f7a8cc17674405dc9d29554a /drivers/gpu/drm/drm_dp_mst_topology.c | |
| parent | bae4e109837b419b93fbddcb414c86673b1c90a5 (diff) | |
| parent | f2ce1065e767fc7da106a5f5381d1e8f842dc6f4 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'drivers/gpu/drm/drm_dp_mst_topology.c')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_mst_topology.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 5ff1d79b86c4..0e0df398222d 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -1275,6 +1275,9 @@ static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device(struct drm_dp_mst_ mutex_lock(&mgr->lock); mstb = mgr->mst_primary; + if (!mstb) + goto out; + for (i = 0; i < lct - 1; i++) { int shift = (i % 2) ? 0 : 4; int port_num = (rad[i / 2] >> shift) & 0xf; |