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Message-ID: <202308242250.G39QxvdR-lkp@intel.com>
Date: Thu, 24 Aug 2023 23:06:07 +0800
From: kernel test robot <lkp@...el.com>
To: Jisheng Zhang <jszhang@...nel.org>,
"David S . Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzk@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Giuseppe Cavallaro <peppe.cavallaro@...com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
netdev@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH net-next 3/3] net: stmmac: add glue layer for T-HEAD
TH1520 SoC
Hi Jisheng,
kernel test robot noticed the following build warnings:
[auto build test WARNING on net-next/main]
url: https://github.com/intel-lab-lkp/linux/commits/Jisheng-Zhang/dt-bindings-net-snps-dwmac-allow-dwmac-3-70a-to-set-pbl-properties/20230821-114902
base: net-next/main
patch link: https://lore.kernel.org/r/20230820120213.2054-4-jszhang%40kernel.org
patch subject: [PATCH net-next 3/3] net: stmmac: add glue layer for T-HEAD TH1520 SoC
config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20230824/202308242250.G39QxvdR-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230824/202308242250.G39QxvdR-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308242250.G39QxvdR-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c:151:3: warning: variable 'div' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized]
151 | default:
| ^~~~~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c:156:50: note: uninitialized use occurs here
156 | GMAC_PLLCLK_DIV_MASK, GMAC_PLLCLK_DIV_NUM(div));
| ^~~
drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c:40:68: note: expanded from macro 'GMAC_PLLCLK_DIV_NUM'
40 | #define GMAC_PLLCLK_DIV_NUM(x) FIELD_PREP(GMAC_PLLCLK_DIV_MASK, (x))
| ^
include/linux/bitfield.h:114:33: note: expanded from macro 'FIELD_PREP'
114 | __BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
| ^~~~
include/linux/bitfield.h:68:41: note: expanded from macro '__BF_FIELD_CHECK'
68 | BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \
| ^~~~
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:397:22: note: expanded from macro 'compiletime_assert'
397 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:385:23: note: expanded from macro '_compiletime_assert'
385 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:377:9: note: expanded from macro '__compiletime_assert'
377 | if (!(condition)) \
| ^~~~~~~~~
drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c:121:9: note: initialize the variable 'div' to silence this warning
121 | u32 div;
| ^
| = 0
1 warning generated.
vim +/div +151 drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c
115
116 static void thead_dwmac_fix_speed(void *priv, unsigned int speed, unsigned int mode)
117 {
118 struct thead_dwmac *dwmac = priv;
119 struct plat_stmmacenet_data *plat = dwmac->plat;
120 unsigned long rate;
121 u32 div;
122
123 switch (plat->interface) {
124 /* For MII, rxc/txc is provided by phy */
125 case PHY_INTERFACE_MODE_MII:
126 return;
127
128 case PHY_INTERFACE_MODE_RGMII:
129 case PHY_INTERFACE_MODE_RGMII_ID:
130 case PHY_INTERFACE_MODE_RGMII_RXID:
131 case PHY_INTERFACE_MODE_RGMII_TXID:
132 rate = clk_get_rate(plat->stmmac_clk);
133 if (!rate || rate % GMAC_GMII_RGMII_RATE != 0 ||
134 rate % GMAC_MII_RATE != 0) {
135 dev_err(dwmac->dev, "invalid gmac rate %ld\n", rate);
136 return;
137 }
138
139 regmap_update_bits(dwmac->apb_regmap, GMAC_PLLCLK_DIV, GMAC_PLLCLK_DIV_EN, 0);
140
141 switch (speed) {
142 case SPEED_1000:
143 div = rate / GMAC_GMII_RGMII_RATE;
144 break;
145 case SPEED_100:
146 div = rate / GMAC_MII_RATE;
147 break;
148 case SPEED_10:
149 div = rate * 10 / GMAC_MII_RATE;
150 break;
> 151 default:
152 dev_err(dwmac->dev, "invalid speed %u\n", speed);
153 break;
154 }
155 regmap_update_bits(dwmac->apb_regmap, GMAC_PLLCLK_DIV,
156 GMAC_PLLCLK_DIV_MASK, GMAC_PLLCLK_DIV_NUM(div));
157
158 regmap_update_bits(dwmac->apb_regmap, GMAC_PLLCLK_DIV,
159 GMAC_PLLCLK_DIV_EN, GMAC_PLLCLK_DIV_EN);
160 break;
161 default:
162 dev_err(dwmac->dev, "unsupported phy interface %d\n",
163 plat->interface);
164 return;
165 }
166 }
167
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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