Hi Christophe, Thank you for the patch! Yet something to improve: [auto build test ERROR on v4.16-rc4] [also build test ERROR on next-20180316] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Christophe-JAILLET/net-ethernet-arc-Fix-a-potential-memory-leak-if-an-optional-regulator-is-deferred/20180317-042849 config: i386-allmodconfig (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): drivers/net/ethernet/arc/emac_rockchip.c: In function 'emac_rockchip_probe': >> drivers/net/ethernet/arc/emac_rockchip.c:173:4: error: 'ret' undeclared (first use in this function); did you mean 'net'? ret = -EPROBE_DEFER; ^~~ net drivers/net/ethernet/arc/emac_rockchip.c:173:4: note: each undeclared identifier is reported only once for each function it appears in vim +173 drivers/net/ethernet/arc/emac_rockchip.c 102 103 static int emac_rockchip_probe(struct platform_device *pdev) 104 { 105 struct device *dev = &pdev->dev; 106 struct net_device *ndev; 107 struct rockchip_priv_data *priv; 108 const struct of_device_id *match; 109 u32 data; 110 int err, interface; 111 112 if (!pdev->dev.of_node) 113 return -ENODEV; 114 115 ndev = alloc_etherdev(sizeof(struct rockchip_priv_data)); 116 if (!ndev) 117 return -ENOMEM; 118 platform_set_drvdata(pdev, ndev); 119 SET_NETDEV_DEV(ndev, dev); 120 121 priv = netdev_priv(ndev); 122 priv->emac.drv_name = DRV_NAME; 123 priv->emac.drv_version = DRV_VERSION; 124 priv->emac.set_mac_speed = emac_rockchip_set_mac_speed; 125 126 interface = of_get_phy_mode(dev->of_node); 127 128 /* RK3036/RK3066/RK3188 SoCs only support RMII */ 129 if (interface != PHY_INTERFACE_MODE_RMII) { 130 dev_err(dev, "unsupported phy interface mode %d\n", interface); 131 err = -ENOTSUPP; 132 goto out_netdev; 133 } 134 135 priv->grf = syscon_regmap_lookup_by_phandle(dev->of_node, 136 "rockchip,grf"); 137 if (IS_ERR(priv->grf)) { 138 dev_err(dev, "failed to retrieve global register file (%ld)\n", 139 PTR_ERR(priv->grf)); 140 err = PTR_ERR(priv->grf); 141 goto out_netdev; 142 } 143 144 match = of_match_node(emac_rockchip_dt_ids, dev->of_node); 145 priv->soc_data = match->data; 146 147 priv->emac.clk = devm_clk_get(dev, "hclk"); 148 if (IS_ERR(priv->emac.clk)) { 149 dev_err(dev, "failed to retrieve host clock (%ld)\n", 150 PTR_ERR(priv->emac.clk)); 151 err = PTR_ERR(priv->emac.clk); 152 goto out_netdev; 153 } 154 155 priv->refclk = devm_clk_get(dev, "macref"); 156 if (IS_ERR(priv->refclk)) { 157 dev_err(dev, "failed to retrieve reference clock (%ld)\n", 158 PTR_ERR(priv->refclk)); 159 err = PTR_ERR(priv->refclk); 160 goto out_netdev; 161 } 162 163 err = clk_prepare_enable(priv->refclk); 164 if (err) { 165 dev_err(dev, "failed to enable reference clock (%d)\n", err); 166 goto out_netdev; 167 } 168 169 /* Optional regulator for PHY */ 170 priv->regulator = devm_regulator_get_optional(dev, "phy"); 171 if (IS_ERR(priv->regulator)) { 172 if (PTR_ERR(priv->regulator) == -EPROBE_DEFER) { > 173 ret = -EPROBE_DEFER; 174 goto out_clk_disable; 175 } 176 dev_err(dev, "no regulator found\n"); 177 priv->regulator = NULL; 178 } 179 180 if (priv->regulator) { 181 err = regulator_enable(priv->regulator); 182 if (err) { 183 dev_err(dev, "failed to enable phy-supply (%d)\n", err); 184 goto out_clk_disable; 185 } 186 } 187 188 /* Set speed 100M */ 189 data = (1 << (priv->soc_data->grf_speed_offset + 16)) | 190 (1 << priv->soc_data->grf_speed_offset); 191 /* Set RMII mode */ 192 data |= (1 << (priv->soc_data->grf_mode_offset + 16)) | 193 (0 << priv->soc_data->grf_mode_offset); 194 195 err = regmap_write(priv->grf, priv->soc_data->grf_offset, data); 196 if (err) { 197 dev_err(dev, "unable to apply initial settings to grf (%d)\n", 198 err); 199 goto out_regulator_disable; 200 } 201 202 /* RMII interface needs always a rate of 50MHz */ 203 err = clk_set_rate(priv->refclk, 50000000); 204 if (err) { 205 dev_err(dev, 206 "failed to change reference clock rate (%d)\n", err); 207 goto out_regulator_disable; 208 } 209 210 if (priv->soc_data->need_div_macclk) { 211 priv->macclk = devm_clk_get(dev, "macclk"); 212 if (IS_ERR(priv->macclk)) { 213 dev_err(dev, "failed to retrieve mac clock (%ld)\n", 214 PTR_ERR(priv->macclk)); 215 err = PTR_ERR(priv->macclk); 216 goto out_regulator_disable; 217 } 218 219 err = clk_prepare_enable(priv->macclk); 220 if (err) { 221 dev_err(dev, "failed to enable mac clock (%d)\n", err); 222 goto out_regulator_disable; 223 } 224 225 /* RMII TX/RX needs always a rate of 25MHz */ 226 err = clk_set_rate(priv->macclk, 25000000); 227 if (err) { 228 dev_err(dev, 229 "failed to change mac clock rate (%d)\n", err); 230 goto out_clk_disable_macclk; 231 } 232 } 233 234 err = arc_emac_probe(ndev, interface); 235 if (err) { 236 dev_err(dev, "failed to probe arc emac (%d)\n", err); 237 goto out_clk_disable_macclk; 238 } 239 240 return 0; 241 242 out_clk_disable_macclk: 243 if (priv->soc_data->need_div_macclk) 244 clk_disable_unprepare(priv->macclk); 245 out_regulator_disable: 246 if (priv->regulator) 247 regulator_disable(priv->regulator); 248 out_clk_disable: 249 clk_disable_unprepare(priv->refclk); 250 out_netdev: 251 free_netdev(ndev); 252 return err; 253 } 254 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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