Il 13/04/23 14:46, Guillaume Ranquet ha scritto:
The ret variable in mtk_hdmi_pll_calc() was used unitialized as reported
by the kernel test robot.
Fix the issue by removing the variable altogether and testing out the
return value of mtk_hdmi_pll_set_hw()
Fixes: 45810d486bb44 ("phy: mediatek: add support for phy-mtk-hdmi-mt8195")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Guillaume Ranquet <granquet@xxxxxxxxxxxx>
---
drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c
index abfc077fb0a8..e10da6c4147e 100644
--- a/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c
+++ b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c
@@ -213,7 +213,7 @@ static int mtk_hdmi_pll_calc(struct mtk_hdmi_phy *hdmi_phy, struct clk_hw *hw,
u64 tmds_clk, pixel_clk, da_hdmitx21_ref_ck, ns_hdmipll_ck, pcw;
u8 txpredivs[4] = { 2, 4, 6, 12 };
u32 fbkdiv_low;
- int i, ret;
+ int i;
pixel_clk = rate;
tmds_clk = pixel_clk;
@@ -292,10 +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,
+ if (mtk_hdmi_pll_set_hw(hw, PLL_PREDIV, fbkdiv_high, fbkdiv_low,
PLL_FBKDIV_HS3, posdiv1, posdiv2, txprediv,
- txposdiv, digital_div);
- if (ret)
+ txposdiv, digital_div))
return -EINVAL;
I don't get why we're returning -EINVAL unconditionally in the first place, here.
Function mtk_hdmi_pll_set_hw() should return zero or a negative error number: in
that case, the previous *intention* was fine, so this should be
ret = mtk_hdmi_pll_set_hw(....)
if (ret)
return ret;
return 0;
Regards,
Angelo
