linux-kernel - [PATCH] drm/amd/display: replace BUG_ON with WARN

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Message-Id: <20191218161505.13416-1-pakki001@umn.edu>
Date:   Wed, 18 Dec 2019 10:15:03 -0600
From:   Aditya Pakki <pakki001@....edu>
To:     pakki001@....edu
Cc:     kjlu@....edu, Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Nicholas Kazlauskas <nicholas.kazlauskas@....com>,
        Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>,
        David Francis <David.Francis@....com>,
        Mario Kleiner <mario.kleiner.de@...il.com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] drm/amd/display: replace BUG_ON with WARN_ON

In skip_modeset label within dm_update_crtc_state(), the dc stream
cannot be NULL. Using BUG_ON as an assertion is not required and
can be removed. The patch replaces the check with a WARN_ON in case
dm_new_crtc_state->stream is NULL.

Signed-off-by: Aditya Pakki <pakki001@....edu>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 7aac9568d3be..03cb30913c20 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7012,7 +7012,7 @@ static int dm_update_crtc_state(struct amdgpu_display_manager *dm,
 	 * 3. Is currently active and enabled.
 	 * => The dc stream state currently exists.
 	 */
-	BUG_ON(dm_new_crtc_state->stream == NULL);
+	WARN_ON(!dm_new_crtc_state->stream);
 
 	/* Scaling or underscan settings */
 	if (is_scaling_state_different(dm_old_conn_state, dm_new_conn_state))
-- 
2.20.1