[Intel-gfx] [PATCH 3/3] drm/i915/dp: Check for AUXCH error before checking for success

[Adam Jackson]

This is paranoid, but I am entirely willing to believe the hardware
could come up with a condition where I get a status with both the 'done'
and 'receive error' bits set.

Signed-off-by: Adam Jackson <ajax at redhat.com>
---
 drivers/gpu/drm/i915/intel_dp.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 875da4e..f086e5e 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -345,6 +345,10 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
 			   DP_AUX_CH_CTL_DONE |
 			   DP_AUX_CH_CTL_TIME_OUT_ERROR |
 			   DP_AUX_CH_CTL_RECEIVE_ERROR);
+
+		if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR |
+			      DP_AUX_CH_CTL_RECEIVE_ERROR))
+			continue;
 		if (status & DP_AUX_CH_CTL_DONE)
 			break;
 	}
-- 
1.7.6