| Message ID | 20230413-fixes-for-mt8195-hdmi-phy-v2-1-bbad62e64321@baylibre.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Fix mtk-hdmi-mt8195 unitialized variable usage and clock rate calculation | expand |
On 14/04/2023 18:07, Guillaume Ranquet wrote: > 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@intel.com> > Signed-off-by: Guillaume Ranquet <granquet@baylibre.com> Looks good, but got unfortunately already fixed 4 hours ago with 20230414122253.3171524-1-trix@redhat.com :) Regards, Matthias > --- > drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c | 8 ++------ > 1 file changed, 2 insertions(+), 6 deletions(-) > > diff --git a/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c > index abfc077fb0a8..054b73cb31ee 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; > @@ -292,13 +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, > + return 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; > - > - return 0; > } > > static int mtk_hdmi_pll_drv_setting(struct clk_hw *hw) >
Il 14/04/23 18:07, 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@intel.com> > Signed-off-by: Guillaume Ranquet <granquet@baylibre.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
On Fri, Apr 14, 2023 at 06:07:46PM +0200, Guillaume Ranquet wrote: > 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@intel.com> > Signed-off-by: Guillaume Ranquet <granquet@baylibre.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Can somebody pick this up? It fixes a rather obvious warning, which is breaking clang builds (as evidenced by three versions of the same fix). > --- > drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c | 8 ++------ > 1 file changed, 2 insertions(+), 6 deletions(-) > > diff --git a/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c > index abfc077fb0a8..054b73cb31ee 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; > @@ -292,13 +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, > + return 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; > - > - return 0; > } > > static int mtk_hdmi_pll_drv_setting(struct clk_hw *hw) > > -- > 2.40.0 >
On Fri, Apr 21, 2023 at 3:13 PM Nathan Chancellor <nathan@kernel.org> wrote: > > On Fri, Apr 14, 2023 at 06:07:46PM +0200, Guillaume Ranquet wrote: > > 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@intel.com> > > Signed-off-by: Guillaume Ranquet <granquet@baylibre.com> > > Reviewed-by: Nathan Chancellor <nathan@kernel.org> > > Can somebody pick this up? It fixes a rather obvious warning, which is > breaking clang builds (as evidenced by three versions of the same fix). $ ./scripts/get_maintainer.pl -f drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c | grep maintainer Chunfeng Yun <chunfeng.yun@mediatek.com> (maintainer:ARM/Mediatek USB3 PHY DRIVER) Matthias Brugger <matthias.bgg@gmail.com> (maintainer:ARM/Mediatek SoC support) Chunfeng, Matthias, can one of you pick this up, please? Or Vinod who merged 45810d486bb44 FWICT? > > > --- > > drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c | 8 ++------ > > 1 file changed, 2 insertions(+), 6 deletions(-) > > > > diff --git a/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c > > index abfc077fb0a8..054b73cb31ee 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; > > @@ -292,13 +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, > > + return 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; > > - > > - return 0; > > } > > > > static int mtk_hdmi_pll_drv_setting(struct clk_hw *hw) > > > > -- > > 2.40.0 > > >
diff --git a/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c index abfc077fb0a8..054b73cb31ee 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; @@ -292,13 +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, + return 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; - - return 0; } static int mtk_hdmi_pll_drv_setting(struct clk_hw *hw)
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@intel.com> Signed-off-by: Guillaume Ranquet <granquet@baylibre.com> --- drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)