linux-kernel - [PATCH] phy: mediatek: fix returning garbage

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Message-Id: <20230414122253.3171524-1-trix@redhat.com>
Date:   Fri, 14 Apr 2023 08:22:53 -0400
From:   Tom Rix <trix@...hat.com>
To:     chunkuang.hu@...nel.org, p.zabel@...gutronix.de,
        chunfeng.yun@...iatek.com, vkoul@...nel.org, kishon@...nel.org,
        matthias.bgg@...il.com, angelogioacchino.delregno@...labora.com,
        nathan@...nel.org, ndesaulniers@...gle.com, granquet@...libre.com
Cc:     dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, Tom Rix <trix@...hat.com>
Subject: [PATCH] phy: mediatek: fix returning garbage

clang reports
drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c:298:6: error: variable
  'ret' is uninitialized when used here [-Werror,-Wuninitialized]
        if (ret)
            ^~~
ret should have been set by the preceding call to mtk_hdmi_pll_set_hw.

Fixes: 45810d486bb4 ("phy: mediatek: add support for phy-mtk-hdmi-mt8195")
Signed-off-by: Tom Rix <trix@...hat.com>
---
 drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c
index abfc077fb0a8..c63294e451d6 100644
--- a/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c
+++ b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c
@@ -292,9 +292,9 @@ static int mtk_hdmi_pll_calc(struct mtk_hdmi_phy *hdmi_phy, struct clk_hw *hw,
 	if (!(digital_div <= 32 && digital_div >= 1))
 		return -EINVAL;
 
-	mtk_hdmi_pll_set_hw(hw, PLL_PREDIV, fbkdiv_high, fbkdiv_low,
-			    PLL_FBKDIV_HS3, posdiv1, posdiv2, txprediv,
-			    txposdiv, digital_div);
+	ret = mtk_hdmi_pll_set_hw(hw, PLL_PREDIV, fbkdiv_high, fbkdiv_low,
+				  PLL_FBKDIV_HS3, posdiv1, posdiv2, txprediv,
+				  txposdiv, digital_div);
 	if (ret)
 		return -EINVAL;
 
-- 
2.27.0