CC: [email protected] BCC: [email protected] CC: [email protected] TO: Krzysztof Kozlowski <[email protected]>
tree: https://github.com/krzk/linux n/qcom-ufs-opp-v3 head: 22a49fd92d5e31234d4174cdf1fdade79f38ae3d commit: ff3c34983e1cca80d8c081ea99e0117c5c38c6c3 [10/13] PM: opp: allow control of multiple clocks :::::: branch date: 16 hours ago :::::: commit date: 18 hours ago config: x86_64-randconfig-m001-20220509 (https://download.01.org/0day-ci/archive/20220510/[email protected]/config) compiler: gcc-11 (Debian 11.2.0-20) 11.2.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> Reported-by: Dan Carpenter <[email protected]> smatch warnings: drivers/opp/core.c:1335 dev_pm_opp_set_rate() error: uninitialized symbol 'ret'. vim +/ret +1335 drivers/opp/core.c 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1263 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1264 /** 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1265 * dev_pm_opp_set_rate() - Configure new OPP based on frequency 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1266 * @dev: device for which we do this operation 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1267 * @target_freq: frequency to achieve 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1268 * 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1269 * This configures the power-supplies to the levels specified by the OPP 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1270 * corresponding to the target_freq, and programs the clock to a value <= 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1271 * target_freq, as rounded by clk_round_rate(). Device wanting to run at fmax 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1272 * provided by the opp, should have already rounded to the target OPP's 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1273 * frequency. 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1274 */ 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1275 int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1276 { 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1277 struct opp_table *opp_table; 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1278 unsigned long freq = 0, temp_freq; 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1279 struct dev_pm_opp *opp = NULL; 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1280 int ret; 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1281 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1282 opp_table = _find_opp_table(dev); 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1283 if (IS_ERR(opp_table)) { 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1284 dev_err(dev, "%s: device's opp table doesn't exist\n", __func__); 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1285 return PTR_ERR(opp_table); 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1286 } 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1287 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1288 if (target_freq) { 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1289 /* 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1290 * For IO devices which require an OPP on some platforms/SoCs 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1291 * while just needing to scale the clock on some others 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1292 * we look for empty OPP tables with just a clock handle and 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1293 * scale only the clk. This makes dev_pm_opp_set_rate() 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1294 * equivalent to a clk_set_rate() 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1295 */ 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1296 if (!_get_opp_count(opp_table)) { ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1297 if (opp_table->clks) ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1298 ret = _generic_set_opp_clk_only(dev, ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1299 opp_table->clks[0], ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1300 target_freq); 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1301 goto put_opp_table; 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1302 } 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1303 ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1304 if (opp_table->clks) ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1305 freq = clk_round_rate(opp_table->clks[0], target_freq); 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1306 if ((long)freq <= 0) 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1307 freq = target_freq; 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1308 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1309 /* 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1310 * The clock driver may support finer resolution of the 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1311 * frequencies than the OPP table, don't update the frequency we 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1312 * pass to clk_set_rate() here. 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1313 */ 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1314 temp_freq = freq; 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1315 opp = _find_freq_ceil(opp_table, &temp_freq); 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1316 if (IS_ERR(opp)) { 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1317 ret = PTR_ERR(opp); 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1318 dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n", 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1319 __func__, freq, ret); 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1320 goto put_opp_table; 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1321 } ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1322 /* ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1323 * opp->rates are used for scaling clocks, so be sure accurate ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1324 * 'freq' is used, instead what was defined via e.g. Devicetree. ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1325 */ ff3c34983e1cca drivers/opp/core.c Krzysztof Kozlowski 2022-04-05 1326 opp->rates[0] = freq; 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1327 } 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1328 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1329 ret = _set_opp(dev, opp_table, opp, freq); 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1330 386ba854d9f316 drivers/opp/core.c Viresh Kumar 2021-01-21 1331 if (target_freq) 8a31d9d94297b1 drivers/base/power/opp/core.c Viresh Kumar 2017-01-23 1332 dev_pm_opp_put(opp); 052c6f19141dd1 drivers/base/power/opp/core.c Viresh Kumar 2017-01-23 1333 put_opp_table: 5b650b388844f2 drivers/base/power/opp/core.c Viresh Kumar 2017-01-23 1334 dev_pm_opp_put_opp_table(opp_table); 052c6f19141dd1 drivers/base/power/opp/core.c Viresh Kumar 2017-01-23 @1335 return ret; 6a0712f6f199e7 drivers/base/power/opp/core.c Viresh Kumar 2016-02-09 1336 } 6a0712f6f199e7 drivers/base/power/opp/core.c Viresh Kumar 2016-02-09 1337 EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate); 6a0712f6f199e7 drivers/base/power/opp/core.c Viresh Kumar 2016-02-09 1338 :::::: The code at line 1335 was first introduced by commit :::::: 052c6f19141dd13f266cc465fde6f38ddc93d5fb PM / OPP: Move away from RCU locking :::::: TO: Viresh Kumar <[email protected]> :::::: CC: Rafael J. 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