linux-kernel - [PATCH][next] drm/amd/display: fix the return of the uninitialized value in ret

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Date:   Tue,  2 Mar 2021 14:05:09 +0000
From:   Colin King <colin.king@...onical.com>
To:     Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Anson Jacob <Anson.Jacob@....com>,
        Mikita Lipski <Mikita.Lipski@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] drm/amd/display: fix the return of the uninitialized value in ret

From: Colin Ian King <colin.king@...onical.com>

Currently if stream->signal is neither SIGNAL_TYPE_DISPLAY_PORT_MST or
SIGNAL_TYPE_DISPLAY_PORT then variable ret is uninitialized and this is
checked for > 0 at the end of the function.  Ret should be initialized,
I believe setting it to zero is a correct default.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: bd0c064c161c ("drm/amd/display: Add return code instead of boolean for future use")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index 5159399f8239..5750818db8f6 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -530,7 +530,7 @@ bool dm_helpers_dp_write_dsc_enable(
 {
 	uint8_t enable_dsc = enable ? 1 : 0;
 	struct amdgpu_dm_connector *aconnector;
-	uint8_t ret;
+	uint8_t ret = 0;
 
 	if (!stream)
 		return false;
-- 
2.30.0