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Message-ID: <f6ab6e62-9f40-4858-9b4e-33d54bf98105@moroto.mountain>
Date: Mon, 19 Feb 2024 10:42:48 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: oe-kbuild@...ts.linux.dev, Raju Rangoju <Raju.Rangoju@....com>,
netdev@...r.kernel.org
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev, davem@...emloft.net,
edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
Shyam-sundar.S-k@....com, Raju Rangoju <Raju.Rangoju@....com>
Subject: Re: [PATCH v5 net-next 4/5] amd-xgbe: Add XGBE_XPCS_ACCESS_V3
support to xgbe_pci_probe()
Hi Raju,
kernel test robot noticed the following build warnings:
url: https://github.com/intel-lab-lkp/linux/commits/Raju-Rangoju/amd-xgbe-reorganize-the-code-of-XPCS-access/20240215-000248
base: net-next/main
patch link: https://lore.kernel.org/r/20240214154842.3577628-5-Raju.Rangoju%40amd.com
patch subject: [PATCH v5 net-next 4/5] amd-xgbe: Add XGBE_XPCS_ACCESS_V3 support to xgbe_pci_probe()
config: openrisc-randconfig-r071-20240215 (https://download.01.org/0day-ci/archive/20240218/202402180755.pdt7twL2-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 13.2.0
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>
| Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
| Closes: https://lore.kernel.org/r/202402180755.pdt7twL2-lkp@intel.com/
smatch warnings:
drivers/net/ethernet/amd/xgbe/xgbe-pci.c:312 xgbe_pci_probe() error: uninitialized symbol 'reg'.
vim +/reg +312 drivers/net/ethernet/amd/xgbe/xgbe-pci.c
47f164deab22a0 Lendacky, Thomas 2016-11-10 209 static int xgbe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
47f164deab22a0 Lendacky, Thomas 2016-11-10 210 {
47f164deab22a0 Lendacky, Thomas 2016-11-10 211 void __iomem * const *iomap_table;
eec387ef1b0556 Raju Rangoju 2024-02-14 212 unsigned int port_addr_size, reg;
eec387ef1b0556 Raju Rangoju 2024-02-14 213 struct device *dev = &pdev->dev;
eec387ef1b0556 Raju Rangoju 2024-02-14 214 struct xgbe_prv_data *pdata;
47f164deab22a0 Lendacky, Thomas 2016-11-10 215 unsigned int ma_lo, ma_hi;
eec387ef1b0556 Raju Rangoju 2024-02-14 216 struct pci_dev *rdev;
eec387ef1b0556 Raju Rangoju 2024-02-14 217 int bar_mask, ret;
eec387ef1b0556 Raju Rangoju 2024-02-14 218 u32 address;
47f164deab22a0 Lendacky, Thomas 2016-11-10 219
47f164deab22a0 Lendacky, Thomas 2016-11-10 220 pdata = xgbe_alloc_pdata(dev);
47f164deab22a0 Lendacky, Thomas 2016-11-10 221 if (IS_ERR(pdata)) {
47f164deab22a0 Lendacky, Thomas 2016-11-10 222 ret = PTR_ERR(pdata);
47f164deab22a0 Lendacky, Thomas 2016-11-10 223 goto err_alloc;
47f164deab22a0 Lendacky, Thomas 2016-11-10 224 }
47f164deab22a0 Lendacky, Thomas 2016-11-10 225
47f164deab22a0 Lendacky, Thomas 2016-11-10 226 pdata->pcidev = pdev;
47f164deab22a0 Lendacky, Thomas 2016-11-10 227 pci_set_drvdata(pdev, pdata);
47f164deab22a0 Lendacky, Thomas 2016-11-10 228
47f164deab22a0 Lendacky, Thomas 2016-11-10 229 /* Get the version data */
47f164deab22a0 Lendacky, Thomas 2016-11-10 230 pdata->vdata = (struct xgbe_version_data *)id->driver_data;
47f164deab22a0 Lendacky, Thomas 2016-11-10 231
47f164deab22a0 Lendacky, Thomas 2016-11-10 232 ret = pcim_enable_device(pdev);
47f164deab22a0 Lendacky, Thomas 2016-11-10 233 if (ret) {
47f164deab22a0 Lendacky, Thomas 2016-11-10 234 dev_err(dev, "pcim_enable_device failed\n");
47f164deab22a0 Lendacky, Thomas 2016-11-10 235 goto err_pci_enable;
47f164deab22a0 Lendacky, Thomas 2016-11-10 236 }
47f164deab22a0 Lendacky, Thomas 2016-11-10 237
47f164deab22a0 Lendacky, Thomas 2016-11-10 238 /* Obtain the mmio areas for the device */
47f164deab22a0 Lendacky, Thomas 2016-11-10 239 bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
47f164deab22a0 Lendacky, Thomas 2016-11-10 240 ret = pcim_iomap_regions(pdev, bar_mask, XGBE_DRV_NAME);
47f164deab22a0 Lendacky, Thomas 2016-11-10 241 if (ret) {
47f164deab22a0 Lendacky, Thomas 2016-11-10 242 dev_err(dev, "pcim_iomap_regions failed\n");
47f164deab22a0 Lendacky, Thomas 2016-11-10 243 goto err_pci_enable;
47f164deab22a0 Lendacky, Thomas 2016-11-10 244 }
47f164deab22a0 Lendacky, Thomas 2016-11-10 245
47f164deab22a0 Lendacky, Thomas 2016-11-10 246 iomap_table = pcim_iomap_table(pdev);
47f164deab22a0 Lendacky, Thomas 2016-11-10 247 if (!iomap_table) {
47f164deab22a0 Lendacky, Thomas 2016-11-10 248 dev_err(dev, "pcim_iomap_table failed\n");
47f164deab22a0 Lendacky, Thomas 2016-11-10 249 ret = -ENOMEM;
47f164deab22a0 Lendacky, Thomas 2016-11-10 250 goto err_pci_enable;
47f164deab22a0 Lendacky, Thomas 2016-11-10 251 }
47f164deab22a0 Lendacky, Thomas 2016-11-10 252
47f164deab22a0 Lendacky, Thomas 2016-11-10 253 pdata->xgmac_regs = iomap_table[XGBE_XGMAC_BAR];
47f164deab22a0 Lendacky, Thomas 2016-11-10 254 if (!pdata->xgmac_regs) {
47f164deab22a0 Lendacky, Thomas 2016-11-10 255 dev_err(dev, "xgmac ioremap failed\n");
47f164deab22a0 Lendacky, Thomas 2016-11-10 256 ret = -ENOMEM;
47f164deab22a0 Lendacky, Thomas 2016-11-10 257 goto err_pci_enable;
47f164deab22a0 Lendacky, Thomas 2016-11-10 258 }
47f164deab22a0 Lendacky, Thomas 2016-11-10 259 pdata->xprop_regs = pdata->xgmac_regs + XGBE_MAC_PROP_OFFSET;
47f164deab22a0 Lendacky, Thomas 2016-11-10 260 pdata->xi2c_regs = pdata->xgmac_regs + XGBE_I2C_CTRL_OFFSET;
47f164deab22a0 Lendacky, Thomas 2016-11-10 261 if (netif_msg_probe(pdata)) {
47f164deab22a0 Lendacky, Thomas 2016-11-10 262 dev_dbg(dev, "xgmac_regs = %p\n", pdata->xgmac_regs);
47f164deab22a0 Lendacky, Thomas 2016-11-10 263 dev_dbg(dev, "xprop_regs = %p\n", pdata->xprop_regs);
47f164deab22a0 Lendacky, Thomas 2016-11-10 264 dev_dbg(dev, "xi2c_regs = %p\n", pdata->xi2c_regs);
47f164deab22a0 Lendacky, Thomas 2016-11-10 265 }
47f164deab22a0 Lendacky, Thomas 2016-11-10 266
47f164deab22a0 Lendacky, Thomas 2016-11-10 267 pdata->xpcs_regs = iomap_table[XGBE_XPCS_BAR];
47f164deab22a0 Lendacky, Thomas 2016-11-10 268 if (!pdata->xpcs_regs) {
47f164deab22a0 Lendacky, Thomas 2016-11-10 269 dev_err(dev, "xpcs ioremap failed\n");
47f164deab22a0 Lendacky, Thomas 2016-11-10 270 ret = -ENOMEM;
47f164deab22a0 Lendacky, Thomas 2016-11-10 271 goto err_pci_enable;
47f164deab22a0 Lendacky, Thomas 2016-11-10 272 }
47f164deab22a0 Lendacky, Thomas 2016-11-10 273 if (netif_msg_probe(pdata))
47f164deab22a0 Lendacky, Thomas 2016-11-10 274 dev_dbg(dev, "xpcs_regs = %p\n", pdata->xpcs_regs);
47f164deab22a0 Lendacky, Thomas 2016-11-10 275
4eccbfc3618692 Lendacky, Thomas 2017-01-20 276 /* Set the PCS indirect addressing definition registers */
4eccbfc3618692 Lendacky, Thomas 2017-01-20 277 rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0));
597d9659e35b7d Raju Rangoju 2024-02-14 278 if (rdev && rdev->vendor == PCI_VENDOR_ID_AMD) {
597d9659e35b7d Raju Rangoju 2024-02-14 279 switch (rdev->device) {
597d9659e35b7d Raju Rangoju 2024-02-14 280 case XGBE_RV_PCI_DEVICE_ID:
4eccbfc3618692 Lendacky, Thomas 2017-01-20 281 pdata->xpcs_window_def_reg = PCS_V2_RV_WINDOW_DEF;
4eccbfc3618692 Lendacky, Thomas 2017-01-20 282 pdata->xpcs_window_sel_reg = PCS_V2_RV_WINDOW_SELECT;
597d9659e35b7d Raju Rangoju 2024-02-14 283 break;
597d9659e35b7d Raju Rangoju 2024-02-14 284 case XGBE_YC_PCI_DEVICE_ID:
dbb6c58b5a61d0 Raju Rangoju 2021-12-20 285 pdata->xpcs_window_def_reg = PCS_V2_YC_WINDOW_DEF;
dbb6c58b5a61d0 Raju Rangoju 2021-12-20 286 pdata->xpcs_window_sel_reg = PCS_V2_YC_WINDOW_SELECT;
6f60ecf233f9a8 Raju Rangoju 2021-12-20 287
6f60ecf233f9a8 Raju Rangoju 2021-12-20 288 /* Yellow Carp devices do not need cdr workaround */
6f60ecf233f9a8 Raju Rangoju 2021-12-20 289 pdata->vdata->an_cdr_workaround = 0;
f97fc7ef414603 Raju Rangoju 2022-10-20 290
f97fc7ef414603 Raju Rangoju 2022-10-20 291 /* Yellow Carp devices do not need rrc */
f97fc7ef414603 Raju Rangoju 2022-10-20 292 pdata->vdata->enable_rrc = 0;
597d9659e35b7d Raju Rangoju 2024-02-14 293 break;
eec387ef1b0556 Raju Rangoju 2024-02-14 294 case XGBE_RN_PCI_DEVICE_ID:
eec387ef1b0556 Raju Rangoju 2024-02-14 295 pdata->xpcs_window_def_reg = PCS_V3_RN_WINDOW_DEF;
eec387ef1b0556 Raju Rangoju 2024-02-14 296 pdata->xpcs_window_sel_reg = PCS_V3_RN_WINDOW_SELECT;
eec387ef1b0556 Raju Rangoju 2024-02-14 297 break;
597d9659e35b7d Raju Rangoju 2024-02-14 298 default:
597d9659e35b7d Raju Rangoju 2024-02-14 299 pdata->xpcs_window_def_reg = PCS_V2_WINDOW_DEF;
597d9659e35b7d Raju Rangoju 2024-02-14 300 pdata->xpcs_window_sel_reg = PCS_V2_WINDOW_SELECT;
597d9659e35b7d Raju Rangoju 2024-02-14 301 break;
597d9659e35b7d Raju Rangoju 2024-02-14 302 }
4eccbfc3618692 Lendacky, Thomas 2017-01-20 303 } else {
4eccbfc3618692 Lendacky, Thomas 2017-01-20 304 pdata->xpcs_window_def_reg = PCS_V2_WINDOW_DEF;
4eccbfc3618692 Lendacky, Thomas 2017-01-20 305 pdata->xpcs_window_sel_reg = PCS_V2_WINDOW_SELECT;
4eccbfc3618692 Lendacky, Thomas 2017-01-20 306 }
4eccbfc3618692 Lendacky, Thomas 2017-01-20 307 pci_dev_put(rdev);
4eccbfc3618692 Lendacky, Thomas 2017-01-20 308
47f164deab22a0 Lendacky, Thomas 2016-11-10 309 /* Configure the PCS indirect addressing support */
eec387ef1b0556 Raju Rangoju 2024-02-14 310 if (pdata->vdata->xpcs_access == XGBE_XPCS_ACCESS_V3) {
eec387ef1b0556 Raju Rangoju 2024-02-14 311 port_addr_size = PCS_RN_PORT_ADDR_SIZE *
eec387ef1b0556 Raju Rangoju 2024-02-14 @312 XP_GET_BITS(reg, XP_PROP_0, PORT_ID);
^^^
reg isn't initalized until 2 lines below.
eec387ef1b0556 Raju Rangoju 2024-02-14 313 pdata->smn_base = PCS_RN_SMN_BASE_ADDR + port_addr_size;
eec387ef1b0556 Raju Rangoju 2024-02-14 314
eec387ef1b0556 Raju Rangoju 2024-02-14 315 address = pdata->smn_base + (pdata->xpcs_window_def_reg);
eec387ef1b0556 Raju Rangoju 2024-02-14 316 reg = XP_IOREAD(pdata, XP_PROP_0);
eec387ef1b0556 Raju Rangoju 2024-02-14 317 amd_smn_read(0, address, ®);
eec387ef1b0556 Raju Rangoju 2024-02-14 318 } else {
4eccbfc3618692 Lendacky, Thomas 2017-01-20 319 reg = XPCS32_IOREAD(pdata, pdata->xpcs_window_def_reg);
eec387ef1b0556 Raju Rangoju 2024-02-14 320 }
eec387ef1b0556 Raju Rangoju 2024-02-14 321
47f164deab22a0 Lendacky, Thomas 2016-11-10 322 pdata->xpcs_window = XPCS_GET_BITS(reg, PCS_V2_WINDOW_DEF, OFFSET);
47f164deab22a0 Lendacky, Thomas 2016-11-10 323 pdata->xpcs_window <<= 6;
47f164deab22a0 Lendacky, Thomas 2016-11-10 324 pdata->xpcs_window_size = XPCS_GET_BITS(reg, PCS_V2_WINDOW_DEF, SIZE);
47f164deab22a0 Lendacky, Thomas 2016-11-10 325 pdata->xpcs_window_size = 1 << (pdata->xpcs_window_size + 7);
47f164deab22a0 Lendacky, Thomas 2016-11-10 326 pdata->xpcs_window_mask = pdata->xpcs_window_size - 1;
47f164deab22a0 Lendacky, Thomas 2016-11-10 327 if (netif_msg_probe(pdata)) {
40452f0ec84a3b Lendacky, Thomas 2017-08-18 328 dev_dbg(dev, "xpcs window def = %#010x\n",
--
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https://github.com/intel/lkp-tests/wiki
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