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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>
This commit is contained in:
Dave Airlie 2015-05-13 09:51:01 +10:00 committed by Alex Deucher
parent fcf3b54282
commit bed447e7d1
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/radeon/radeon_dp_mst.c
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@ -666,6 +666,9 @@ radeon_dp_mst_probe(struct radeon_connector *radeon_connector)
int ret;
u8 msg[1];
if (!radeon_mst)
return 0;
if (dig_connector->dpcd[DP_DPCD_REV] < 0x12)
return 0;