Hi Vijendar, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 66f4beaa6c1d28161f534471484b2daa2de1dce0 commit: 89728d97db3f078aceb967ebe5ed2d0797b6a117 ASoC: amd: enable Yellow carp acp6x drivers build config: x86_64-randconfig-m001-20211028 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; smatch warnings: sound/soc/amd/yc/pci-acp6x.c:251 snd_acp6x_probe() error: uninitialized symbol 'index'. vim +/index +251 sound/soc/amd/yc/pci-acp6x.c c62442bd5d9f86 Vijendar Mukunda 2021-10-18 144 static int snd_acp6x_probe(struct pci_dev *pci, c62442bd5d9f86 Vijendar Mukunda 2021-10-18 145 const struct pci_device_id *pci_id) c62442bd5d9f86 Vijendar Mukunda 2021-10-18 146 { c62442bd5d9f86 Vijendar Mukunda 2021-10-18 147 struct acp6x_dev_data *adata; fc329c1de49825 Vijendar Mukunda 2021-10-18 148 struct platform_device_info pdevinfo[ACP6x_DEVS]; fc329c1de49825 Vijendar Mukunda 2021-10-18 149 int ret, index; fc329c1de49825 Vijendar Mukunda 2021-10-18 150 int val = 0x00; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 151 u32 addr; cc0deaa2dc7300 Vijendar Mukunda 2021-10-18 152 unsigned int irqflags; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 153 cc0deaa2dc7300 Vijendar Mukunda 2021-10-18 154 irqflags = IRQF_SHARED; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 155 /* Yellow Carp device check */ c62442bd5d9f86 Vijendar Mukunda 2021-10-18 156 if (pci->revision != 0x60) c62442bd5d9f86 Vijendar Mukunda 2021-10-18 157 return -ENODEV; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 158 c62442bd5d9f86 Vijendar Mukunda 2021-10-18 159 if (pci_enable_device(pci)) { c62442bd5d9f86 Vijendar Mukunda 2021-10-18 160 dev_err(&pci->dev, "pci_enable_device failed\n"); c62442bd5d9f86 Vijendar Mukunda 2021-10-18 161 return -ENODEV; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 162 } c62442bd5d9f86 Vijendar Mukunda 2021-10-18 163 c62442bd5d9f86 Vijendar Mukunda 2021-10-18 164 ret = pci_request_regions(pci, "AMD ACP3x audio"); c62442bd5d9f86 Vijendar Mukunda 2021-10-18 165 if (ret < 0) { c62442bd5d9f86 Vijendar Mukunda 2021-10-18 166 dev_err(&pci->dev, "pci_request_regions failed\n"); c62442bd5d9f86 Vijendar Mukunda 2021-10-18 167 goto disable_pci; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 168 } c62442bd5d9f86 Vijendar Mukunda 2021-10-18 169 c62442bd5d9f86 Vijendar Mukunda 2021-10-18 170 adata = devm_kzalloc(&pci->dev, sizeof(struct acp6x_dev_data), c62442bd5d9f86 Vijendar Mukunda 2021-10-18 171 GFP_KERNEL); c62442bd5d9f86 Vijendar Mukunda 2021-10-18 172 if (!adata) { c62442bd5d9f86 Vijendar Mukunda 2021-10-18 173 ret = -ENOMEM; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 174 goto release_regions; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 175 } c62442bd5d9f86 Vijendar Mukunda 2021-10-18 176 c62442bd5d9f86 Vijendar Mukunda 2021-10-18 177 addr = pci_resource_start(pci, 0); c62442bd5d9f86 Vijendar Mukunda 2021-10-18 178 adata->acp6x_base = devm_ioremap(&pci->dev, addr, c62442bd5d9f86 Vijendar Mukunda 2021-10-18 179 pci_resource_len(pci, 0)); c62442bd5d9f86 Vijendar Mukunda 2021-10-18 180 if (!adata->acp6x_base) { c62442bd5d9f86 Vijendar Mukunda 2021-10-18 181 ret = -ENOMEM; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 182 goto release_regions; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 183 } c62442bd5d9f86 Vijendar Mukunda 2021-10-18 184 pci_set_master(pci); c62442bd5d9f86 Vijendar Mukunda 2021-10-18 185 pci_set_drvdata(pci, adata); 8c7161f2c97b2d Vijendar Mukunda 2021-10-18 186 ret = acp6x_init(adata->acp6x_base); 8c7161f2c97b2d Vijendar Mukunda 2021-10-18 187 if (ret) 8c7161f2c97b2d Vijendar Mukunda 2021-10-18 188 goto release_regions; fc329c1de49825 Vijendar Mukunda 2021-10-18 189 val = acp6x_readl(adata->acp6x_base + ACP_PIN_CONFIG); fc329c1de49825 Vijendar Mukunda 2021-10-18 190 switch (val) { fc329c1de49825 Vijendar Mukunda 2021-10-18 191 case ACP_CONFIG_0: fc329c1de49825 Vijendar Mukunda 2021-10-18 192 case ACP_CONFIG_1: fc329c1de49825 Vijendar Mukunda 2021-10-18 193 case ACP_CONFIG_2: fc329c1de49825 Vijendar Mukunda 2021-10-18 194 case ACP_CONFIG_3: fc329c1de49825 Vijendar Mukunda 2021-10-18 195 case ACP_CONFIG_9: fc329c1de49825 Vijendar Mukunda 2021-10-18 196 case ACP_CONFIG_15: fc329c1de49825 Vijendar Mukunda 2021-10-18 197 dev_info(&pci->dev, "Audio Mode %d\n", val); fc329c1de49825 Vijendar Mukunda 2021-10-18 198 break; "index" is not set for these cases. fc329c1de49825 Vijendar Mukunda 2021-10-18 199 default: fc329c1de49825 Vijendar Mukunda 2021-10-18 200 adata->res = devm_kzalloc(&pci->dev, fc329c1de49825 Vijendar Mukunda 2021-10-18 201 sizeof(struct resource), fc329c1de49825 Vijendar Mukunda 2021-10-18 202 GFP_KERNEL); fc329c1de49825 Vijendar Mukunda 2021-10-18 203 if (!adata->res) { fc329c1de49825 Vijendar Mukunda 2021-10-18 204 ret = -ENOMEM; fc329c1de49825 Vijendar Mukunda 2021-10-18 205 goto de_init; fc329c1de49825 Vijendar Mukunda 2021-10-18 206 } fc329c1de49825 Vijendar Mukunda 2021-10-18 207 fc329c1de49825 Vijendar Mukunda 2021-10-18 208 adata->res->name = "acp_iomem"; fc329c1de49825 Vijendar Mukunda 2021-10-18 209 adata->res->flags = IORESOURCE_MEM; fc329c1de49825 Vijendar Mukunda 2021-10-18 210 adata->res->start = addr; fc329c1de49825 Vijendar Mukunda 2021-10-18 211 adata->res->end = addr + (ACP6x_REG_END - ACP6x_REG_START); fc329c1de49825 Vijendar Mukunda 2021-10-18 212 fc329c1de49825 Vijendar Mukunda 2021-10-18 213 adata->acp6x_audio_mode = ACP6x_PDM_MODE; fc329c1de49825 Vijendar Mukunda 2021-10-18 214 fc329c1de49825 Vijendar Mukunda 2021-10-18 215 memset(&pdevinfo, 0, sizeof(pdevinfo)); fc329c1de49825 Vijendar Mukunda 2021-10-18 216 pdevinfo[0].name = "acp_yc_pdm_dma"; fc329c1de49825 Vijendar Mukunda 2021-10-18 217 pdevinfo[0].id = 0; fc329c1de49825 Vijendar Mukunda 2021-10-18 218 pdevinfo[0].parent = &pci->dev; fc329c1de49825 Vijendar Mukunda 2021-10-18 219 pdevinfo[0].num_res = 1; fc329c1de49825 Vijendar Mukunda 2021-10-18 220 pdevinfo[0].res = adata->res; 8c7161f2c97b2d Vijendar Mukunda 2021-10-18 221 fc329c1de49825 Vijendar Mukunda 2021-10-18 222 pdevinfo[1].name = "dmic-codec"; fc329c1de49825 Vijendar Mukunda 2021-10-18 223 pdevinfo[1].id = 0; fc329c1de49825 Vijendar Mukunda 2021-10-18 224 pdevinfo[1].parent = &pci->dev; fc329c1de49825 Vijendar Mukunda 2021-10-18 225 fc329c1de49825 Vijendar Mukunda 2021-10-18 226 for (index = 0; index < ACP6x_DEVS; index++) { fc329c1de49825 Vijendar Mukunda 2021-10-18 227 adata->pdev[index] = fc329c1de49825 Vijendar Mukunda 2021-10-18 228 platform_device_register_full(&pdevinfo[index]); fc329c1de49825 Vijendar Mukunda 2021-10-18 229 if (IS_ERR(adata->pdev[index])) { fc329c1de49825 Vijendar Mukunda 2021-10-18 230 dev_err(&pci->dev, "cannot register %s device\n", fc329c1de49825 Vijendar Mukunda 2021-10-18 231 pdevinfo[index].name); fc329c1de49825 Vijendar Mukunda 2021-10-18 232 ret = PTR_ERR(adata->pdev[index]); fc329c1de49825 Vijendar Mukunda 2021-10-18 233 goto unregister_devs; fc329c1de49825 Vijendar Mukunda 2021-10-18 234 } fc329c1de49825 Vijendar Mukunda 2021-10-18 235 } fc329c1de49825 Vijendar Mukunda 2021-10-18 236 break; fc329c1de49825 Vijendar Mukunda 2021-10-18 237 } cc0deaa2dc7300 Vijendar Mukunda 2021-10-18 238 ret = devm_request_irq(&pci->dev, pci->irq, acp6x_irq_handler, cc0deaa2dc7300 Vijendar Mukunda 2021-10-18 239 irqflags, "ACP_PCI_IRQ", adata); cc0deaa2dc7300 Vijendar Mukunda 2021-10-18 240 if (ret) { cc0deaa2dc7300 Vijendar Mukunda 2021-10-18 241 dev_err(&pci->dev, "ACP PCI IRQ request failed\n"); cc0deaa2dc7300 Vijendar Mukunda 2021-10-18 242 goto unregister_devs; cc0deaa2dc7300 Vijendar Mukunda 2021-10-18 243 } c8212df7bc0f2e Vijendar Mukunda 2021-10-18 244 pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS); c8212df7bc0f2e Vijendar Mukunda 2021-10-18 245 pm_runtime_use_autosuspend(&pci->dev); c8212df7bc0f2e Vijendar Mukunda 2021-10-18 246 pm_runtime_put_noidle(&pci->dev); c8212df7bc0f2e Vijendar Mukunda 2021-10-18 247 pm_runtime_allow(&pci->dev); c8212df7bc0f2e Vijendar Mukunda 2021-10-18 248 c62442bd5d9f86 Vijendar Mukunda 2021-10-18 249 return 0; fc329c1de49825 Vijendar Mukunda 2021-10-18 250 unregister_devs: fc329c1de49825 Vijendar Mukunda 2021-10-18 @251 for (--index; index >= 0; index--) Uninitialized variable "index". fc329c1de49825 Vijendar Mukunda 2021-10-18 252 platform_device_unregister(adata->pdev[index]); fc329c1de49825 Vijendar Mukunda 2021-10-18 253 de_init: fc329c1de49825 Vijendar Mukunda 2021-10-18 254 if (acp6x_deinit(adata->acp6x_base)) fc329c1de49825 Vijendar Mukunda 2021-10-18 255 dev_err(&pci->dev, "ACP de-init failed\n"); c62442bd5d9f86 Vijendar Mukunda 2021-10-18 256 release_regions: c62442bd5d9f86 Vijendar Mukunda 2021-10-18 257 pci_release_regions(pci); c62442bd5d9f86 Vijendar Mukunda 2021-10-18 258 disable_pci: c62442bd5d9f86 Vijendar Mukunda 2021-10-18 259 pci_disable_device(pci); c62442bd5d9f86 Vijendar Mukunda 2021-10-18 260 c62442bd5d9f86 Vijendar Mukunda 2021-10-18 261 return ret; c62442bd5d9f86 Vijendar Mukunda 2021-10-18 262 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org