linux-kernel - [PATCH v6 13/13] media: platform: mtk-mdp3: fix uninitialized variable in mdp_path

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Message-ID: <20230922074145.11977-14-moudy.ho@mediatek.com>
Date:   Fri, 22 Sep 2023 15:41:45 +0800
From:   Moudy Ho <moudy.ho@...iatek.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Ping-Hsun Wu <ping-hsun.wu@...iatek.com>,
        daoyuan huang <daoyuan.huang@...iatek.com>,
        "Hans Verkuil" <hverkuil-cisco@...all.nl>
CC:     <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Moudy Ho <moudy.ho@...iatek.com>
Subject: [PATCH v6 13/13] media: platform: mtk-mdp3: fix uninitialized variable in mdp_path_config()

Fix the build warnings that were detected by the linux-media
build scripts tool:

drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c:
	In function 'mdp_path_config.isra':
drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c:443:51:
	warning: 'ctx' may be used uninitialized [-Wmaybe-uninitialized]
  443 |                    out = CFG_COMP(MT8195, ctx->param, outputs[0]);
      |                                           ~~~^~~~~~~
drivers/media/platform/mediatek/mdp3/mtk-img-ipi.h:137:25: note:
	in definition of macro 'CFG_COMP'
  137 |         (IS_ERR_OR_NULL(comp) ? 0 : _CFG_COMP(plat, comp, mem))
      |                         ^~~~
drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c:396:30:
	note: 'ctx' was declared here
  396 |         struct mdp_comp_ctx *ctx;
      |

Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
Signed-off-by: Moudy Ho <moudy.ho@...iatek.com>
---
 drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
index 15a0b944745e..4a8d941178aa 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
@@ -436,13 +436,13 @@ static int mdp_path_config(struct mdp_dev *mdp, struct mdp_cmdq_cmd *cmd,
 		if (mdp_cfg_comp_is_dummy(path->mdp_dev, inner_id))
 			continue;
 
+		ctx = &path->comps[index];
 		if (CFG_CHECK(MT8183, p_id))
 			out = CFG_COMP(MT8183, ctx->param, outputs[0]);
 		else if (CFG_CHECK(MT8195, p_id))
 			out = CFG_COMP(MT8195, ctx->param, outputs[0]);
 
 		compose = path->composes[out];
-		ctx = &path->comps[index];
 		ret = call_op(ctx, config_frame, cmd, compose);
 		if (ret)
 			return ret;
-- 
2.18.0