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From f58a68bc2e598716e93bbd61593c42dd925b9afb Mon Sep 17 00:00:00 2001
From: Tony Cheng <tony.cheng@amd.com>
Date: Sat, 14 Jan 2017 01:44:52 -0500
Subject: [PATCH 0148/4131] drm/amd/display: assert if mask is 0 in
set_reg_field_value_ex
- mask = 0 means something is wrong in caller and no register field will be updated
Signed-off-by: Tony Cheng <tony.cheng@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/dm_services.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dm_services.h b/drivers/gpu/drm/amd/display/dc/dm_services.h
index 11a0abf..052a43a 100644
--- a/drivers/gpu/drm/amd/display/dc/dm_services.h
+++ b/drivers/gpu/drm/amd/display/dc/dm_services.h
@@ -165,6 +165,7 @@ static inline uint32_t set_reg_field_value_ex(
uint32_t mask,
uint8_t shift)
{
+ ASSERT(mask != 0);
return (reg_value & ~mask) | (mask & (value << shift));
}
--
2.7.4
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