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drm/radeon: don't do mst probing if MST isn't enabled.
This causes an oops as we haven't initialised the mst layer. Reported-by: Dave Jones <<davej@codemonkey.org.uk> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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@ -666,6 +666,9 @@ radeon_dp_mst_probe(struct radeon_connector *radeon_connector)
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int ret;
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u8 msg[1];
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if (!radeon_mst)
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return 0;
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if (dig_connector->dpcd[DP_DPCD_REV] < 0x12)
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return 0;
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