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Message-ID: <202608011915.yZ4ITuSe-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: :::::: :::::: Manual check reason: "low confidence static check warning: drivers/uio/uio_fsl_elbc_gpcm.c:323:19: sparse: sparse: unsigned value that used to be signed checked against zero?" :::::: BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev TO: Rosen Penev CC: "Greg Kroah-Hartman" Hi Rosen, FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant. tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git char-misc-testing head: 220190f97da558e67cd01c62f1b84fe77b267a5a commit: c8295feb756f5e3ccf02c14a90a2ee0aed95e409 [56/61] uio: fsl_elbc_gpcm: use platform helpers for resource and IRQ :::::: branch date: 23 hours ago :::::: commit date: 23 hours ago config: powerpc-randconfig-r111-20260801 (https://download.01.org/0day-ci/archive/20260801/202608011915.yZ4ITuSe-lkp@intel.com/config) compiler: powerpc-linux-gcc (GCC) 14.3.0 sparse: v0.6.5-rc1 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260801/202608011915.yZ4ITuSe-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 | Closes: https://lore.kernel.org/r/202608011915.yZ4ITuSe-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) drivers/uio/uio_fsl_elbc_gpcm.c:85:53: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct fsl_lbc_bank *bank @@ got struct fsl_lbc_bank [noderef] __iomem * @@ drivers/uio/uio_fsl_elbc_gpcm.c:85:53: sparse: expected struct fsl_lbc_bank *bank drivers/uio/uio_fsl_elbc_gpcm.c:85:53: sparse: got struct fsl_lbc_bank [noderef] __iomem * drivers/uio/uio_fsl_elbc_gpcm.c:89:43: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int const volatile [noderef] [usertype] __iomem *addr @@ got restricted __be32 * @@ drivers/uio/uio_fsl_elbc_gpcm.c:89:43: sparse: expected unsigned int const volatile [noderef] [usertype] __iomem *addr drivers/uio/uio_fsl_elbc_gpcm.c:89:43: sparse: got restricted __be32 * drivers/uio/uio_fsl_elbc_gpcm.c:93:43: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int const volatile [noderef] [usertype] __iomem *addr @@ got restricted __be32 * @@ drivers/uio/uio_fsl_elbc_gpcm.c:93:43: sparse: expected unsigned int const volatile [noderef] [usertype] __iomem *addr drivers/uio/uio_fsl_elbc_gpcm.c:93:43: sparse: got restricted __be32 * drivers/uio/uio_fsl_elbc_gpcm.c:104:53: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct fsl_lbc_bank *bank @@ got struct fsl_lbc_bank [noderef] __iomem * @@ drivers/uio/uio_fsl_elbc_gpcm.c:104:53: sparse: expected struct fsl_lbc_bank *bank drivers/uio/uio_fsl_elbc_gpcm.c:104:53: sparse: got struct fsl_lbc_bank [noderef] __iomem * drivers/uio/uio_fsl_elbc_gpcm.c:116:31: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int const volatile [noderef] [usertype] __iomem *addr @@ got restricted __be32 * @@ drivers/uio/uio_fsl_elbc_gpcm.c:116:31: sparse: expected unsigned int const volatile [noderef] [usertype] __iomem *addr drivers/uio/uio_fsl_elbc_gpcm.c:116:31: sparse: got restricted __be32 * drivers/uio/uio_fsl_elbc_gpcm.c:117:31: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int const volatile [noderef] [usertype] __iomem *addr @@ got restricted __be32 * @@ drivers/uio/uio_fsl_elbc_gpcm.c:117:31: sparse: expected unsigned int const volatile [noderef] [usertype] __iomem *addr drivers/uio/uio_fsl_elbc_gpcm.c:117:31: sparse: got restricted __be32 * drivers/uio/uio_fsl_elbc_gpcm.c:131:27: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int volatile [noderef] [usertype] __iomem *addr @@ got restricted __be32 * @@ drivers/uio/uio_fsl_elbc_gpcm.c:131:27: sparse: expected unsigned int volatile [noderef] [usertype] __iomem *addr drivers/uio/uio_fsl_elbc_gpcm.c:131:27: sparse: got restricted __be32 * drivers/uio/uio_fsl_elbc_gpcm.c:139:27: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int volatile [noderef] [usertype] __iomem *addr @@ got restricted __be32 * @@ drivers/uio/uio_fsl_elbc_gpcm.c:139:27: sparse: expected unsigned int volatile [noderef] [usertype] __iomem *addr drivers/uio/uio_fsl_elbc_gpcm.c:139:27: sparse: got restricted __be32 * drivers/uio/uio_fsl_elbc_gpcm.c:345:46: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int const volatile [noderef] [usertype] __iomem *addr @@ got restricted __be32 [noderef] __iomem * @@ drivers/uio/uio_fsl_elbc_gpcm.c:345:46: sparse: expected unsigned int const volatile [noderef] [usertype] __iomem *addr drivers/uio/uio_fsl_elbc_gpcm.c:345:46: sparse: got restricted __be32 [noderef] __iomem * drivers/uio/uio_fsl_elbc_gpcm.c:346:46: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int const volatile [noderef] [usertype] __iomem *addr @@ got restricted __be32 [noderef] __iomem * @@ drivers/uio/uio_fsl_elbc_gpcm.c:346:46: sparse: expected unsigned int const volatile [noderef] [usertype] __iomem *addr drivers/uio/uio_fsl_elbc_gpcm.c:346:46: sparse: got restricted __be32 [noderef] __iomem * drivers/uio/uio_fsl_elbc_gpcm.c:375:34: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int volatile [noderef] [usertype] __iomem *addr @@ got restricted __be32 [noderef] __iomem * @@ drivers/uio/uio_fsl_elbc_gpcm.c:375:34: sparse: expected unsigned int volatile [noderef] [usertype] __iomem *addr drivers/uio/uio_fsl_elbc_gpcm.c:375:34: sparse: got restricted __be32 [noderef] __iomem * drivers/uio/uio_fsl_elbc_gpcm.c:376:34: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int volatile [noderef] [usertype] __iomem *addr @@ got restricted __be32 [noderef] __iomem * @@ drivers/uio/uio_fsl_elbc_gpcm.c:376:34: sparse: expected unsigned int volatile [noderef] [usertype] __iomem *addr drivers/uio/uio_fsl_elbc_gpcm.c:376:34: sparse: got restricted __be32 [noderef] __iomem * >> drivers/uio/uio_fsl_elbc_gpcm.c:323:19: sparse: sparse: unsigned value that used to be signed checked against zero? drivers/uio/uio_fsl_elbc_gpcm.c:322:31: sparse: signed value source vim +323 drivers/uio/uio_fsl_elbc_gpcm.c fbc4a8a85777e06 John Ogness 2014-12-09 297 fbc4a8a85777e06 John Ogness 2014-12-09 298 static int uio_fsl_elbc_gpcm_probe(struct platform_device *pdev) fbc4a8a85777e06 John Ogness 2014-12-09 299 { fbc4a8a85777e06 John Ogness 2014-12-09 300 struct device_node *node = pdev->dev.of_node; fbc4a8a85777e06 John Ogness 2014-12-09 301 struct fsl_elbc_gpcm *priv; fbc4a8a85777e06 John Ogness 2014-12-09 302 struct uio_info *info; fbc4a8a85777e06 John Ogness 2014-12-09 303 char *uio_name = NULL; c8295feb756f5e3 Rosen Penev 2026-07-22 304 struct resource *res; c8295feb756f5e3 Rosen Penev 2026-07-22 305 void __iomem *base; fbc4a8a85777e06 John Ogness 2014-12-09 306 unsigned int irq; fbc4a8a85777e06 John Ogness 2014-12-09 307 u32 reg_br_cur; fbc4a8a85777e06 John Ogness 2014-12-09 308 u32 reg_or_cur; fbc4a8a85777e06 John Ogness 2014-12-09 309 u32 reg_br_new; fbc4a8a85777e06 John Ogness 2014-12-09 310 u32 reg_or_new; fbc4a8a85777e06 John Ogness 2014-12-09 311 int ret; fbc4a8a85777e06 John Ogness 2014-12-09 312 fbc4a8a85777e06 John Ogness 2014-12-09 313 if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs) fbc4a8a85777e06 John Ogness 2014-12-09 314 return -ENODEV; fbc4a8a85777e06 John Ogness 2014-12-09 315 c8295feb756f5e3 Rosen Penev 2026-07-22 316 /* map the memory resource */ c8295feb756f5e3 Rosen Penev 2026-07-22 317 base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); c8295feb756f5e3 Rosen Penev 2026-07-22 318 if (IS_ERR(base)) c8295feb756f5e3 Rosen Penev 2026-07-22 319 return PTR_ERR(base); c8295feb756f5e3 Rosen Penev 2026-07-22 320 c8295feb756f5e3 Rosen Penev 2026-07-22 321 /* get optional irq value */ c8295feb756f5e3 Rosen Penev 2026-07-22 322 irq = platform_get_irq(pdev, 0); c8295feb756f5e3 Rosen Penev 2026-07-22 @323 if (irq < 0) c8295feb756f5e3 Rosen Penev 2026-07-22 324 return irq; c8295feb756f5e3 Rosen Penev 2026-07-22 325 fbc4a8a85777e06 John Ogness 2014-12-09 326 /* allocate private data */ d57801c45f53e3d Alexandru Ardelean 2020-11-19 327 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); fbc4a8a85777e06 John Ogness 2014-12-09 328 if (!priv) fbc4a8a85777e06 John Ogness 2014-12-09 329 return -ENOMEM; fbc4a8a85777e06 John Ogness 2014-12-09 330 priv->dev = &pdev->dev; fbc4a8a85777e06 John Ogness 2014-12-09 331 priv->lbc = fsl_lbc_ctrl_dev->regs; fbc4a8a85777e06 John Ogness 2014-12-09 332 fbc4a8a85777e06 John Ogness 2014-12-09 333 /* get device tree data */ c8295feb756f5e3 Rosen Penev 2026-07-22 334 ret = get_of_data(priv, node, res, ®_br_new, ®_or_new, c8295feb756f5e3 Rosen Penev 2026-07-22 335 &uio_name); fbc4a8a85777e06 John Ogness 2014-12-09 336 if (ret) d57801c45f53e3d Alexandru Ardelean 2020-11-19 337 return ret; fbc4a8a85777e06 John Ogness 2014-12-09 338 fbc4a8a85777e06 John Ogness 2014-12-09 339 /* allocate UIO structure */ d57801c45f53e3d Alexandru Ardelean 2020-11-19 340 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); d57801c45f53e3d Alexandru Ardelean 2020-11-19 341 if (!info) d57801c45f53e3d Alexandru Ardelean 2020-11-19 342 return -ENOMEM; fbc4a8a85777e06 John Ogness 2014-12-09 343 fbc4a8a85777e06 John Ogness 2014-12-09 344 /* get current BR/OR values */ fbc4a8a85777e06 John Ogness 2014-12-09 345 reg_br_cur = in_be32(&priv->lbc->bank[priv->bank].br); fbc4a8a85777e06 John Ogness 2014-12-09 @346 reg_or_cur = in_be32(&priv->lbc->bank[priv->bank].or); fbc4a8a85777e06 John Ogness 2014-12-09 347 fbc4a8a85777e06 John Ogness 2014-12-09 348 /* if bank already configured, make sure it matches */ fbc4a8a85777e06 John Ogness 2014-12-09 349 if ((reg_br_cur & BR_V)) { fbc4a8a85777e06 John Ogness 2014-12-09 350 if ((reg_br_cur & BR_MSEL) != BR_MS_GPCM || fbc4a8a85777e06 John Ogness 2014-12-09 351 (reg_br_cur & reg_or_cur & BR_BA) c8295feb756f5e3 Rosen Penev 2026-07-22 352 != fsl_lbc_addr(res->start)) { fbc4a8a85777e06 John Ogness 2014-12-09 353 dev_err(priv->dev, fbc4a8a85777e06 John Ogness 2014-12-09 354 "bank in use by another peripheral\n"); d57801c45f53e3d Alexandru Ardelean 2020-11-19 355 return -ENODEV; fbc4a8a85777e06 John Ogness 2014-12-09 356 } fbc4a8a85777e06 John Ogness 2014-12-09 357 fbc4a8a85777e06 John Ogness 2014-12-09 358 /* warn if behavior settings changing */ fbc4a8a85777e06 John Ogness 2014-12-09 359 if ((reg_br_cur & ~(BR_BA | BR_V)) != fbc4a8a85777e06 John Ogness 2014-12-09 360 (reg_br_new & ~(BR_BA | BR_V))) { fbc4a8a85777e06 John Ogness 2014-12-09 361 dev_warn(priv->dev, fbc4a8a85777e06 John Ogness 2014-12-09 362 "modifying BR settings: 0x%08x -> 0x%08x", fbc4a8a85777e06 John Ogness 2014-12-09 363 reg_br_cur, reg_br_new); fbc4a8a85777e06 John Ogness 2014-12-09 364 } fbc4a8a85777e06 John Ogness 2014-12-09 365 if ((reg_or_cur & ~OR_GPCM_AM) != (reg_or_new & ~OR_GPCM_AM)) { fbc4a8a85777e06 John Ogness 2014-12-09 366 dev_warn(priv->dev, fbc4a8a85777e06 John Ogness 2014-12-09 367 "modifying OR settings: 0x%08x -> 0x%08x", fbc4a8a85777e06 John Ogness 2014-12-09 368 reg_or_cur, reg_or_new); fbc4a8a85777e06 John Ogness 2014-12-09 369 } fbc4a8a85777e06 John Ogness 2014-12-09 370 } fbc4a8a85777e06 John Ogness 2014-12-09 371 fbc4a8a85777e06 John Ogness 2014-12-09 372 /* configure the bank (force base address and GPCM) */ fbc4a8a85777e06 John Ogness 2014-12-09 373 reg_br_new &= ~(BR_BA | BR_MSEL); c8295feb756f5e3 Rosen Penev 2026-07-22 374 reg_br_new |= fsl_lbc_addr(res->start) | BR_MS_GPCM | BR_V; fbc4a8a85777e06 John Ogness 2014-12-09 375 out_be32(&priv->lbc->bank[priv->bank].or, reg_or_new); fbc4a8a85777e06 John Ogness 2014-12-09 376 out_be32(&priv->lbc->bank[priv->bank].br, reg_br_new); fbc4a8a85777e06 John Ogness 2014-12-09 377 fbc4a8a85777e06 John Ogness 2014-12-09 378 /* set all UIO data */ d57801c45f53e3d Alexandru Ardelean 2020-11-19 379 info->mem[0].name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%pOFn", node); c8295feb756f5e3 Rosen Penev 2026-07-22 380 if (!info->mem[0].name) c8295feb756f5e3 Rosen Penev 2026-07-22 381 return -ENODEV; d48fb15e6ad142e Li Qiang 2025-10-15 382 c8295feb756f5e3 Rosen Penev 2026-07-22 383 info->mem[0].internal_addr = base; c8295feb756f5e3 Rosen Penev 2026-07-22 384 info->mem[0].addr = res->start; c8295feb756f5e3 Rosen Penev 2026-07-22 385 info->mem[0].size = resource_size(res); fbc4a8a85777e06 John Ogness 2014-12-09 386 info->mem[0].memtype = UIO_MEM_PHYS; fbc4a8a85777e06 John Ogness 2014-12-09 387 info->priv = priv; fbc4a8a85777e06 John Ogness 2014-12-09 388 info->name = uio_name; fbc4a8a85777e06 John Ogness 2014-12-09 389 info->version = "0.0.1"; e48031603ae6440 Christophe Leroy 2022-10-06 390 if (irq) { fbc4a8a85777e06 John Ogness 2014-12-09 391 if (priv->irq_handler) { fbc4a8a85777e06 John Ogness 2014-12-09 392 info->irq = irq; fbc4a8a85777e06 John Ogness 2014-12-09 393 info->irq_flags = IRQF_SHARED; fbc4a8a85777e06 John Ogness 2014-12-09 394 info->handler = priv->irq_handler; fbc4a8a85777e06 John Ogness 2014-12-09 395 } else { e48031603ae6440 Christophe Leroy 2022-10-06 396 irq = 0; fbc4a8a85777e06 John Ogness 2014-12-09 397 dev_warn(priv->dev, "ignoring irq, no handler\n"); fbc4a8a85777e06 John Ogness 2014-12-09 398 } fbc4a8a85777e06 John Ogness 2014-12-09 399 } fbc4a8a85777e06 John Ogness 2014-12-09 400 fbc4a8a85777e06 John Ogness 2014-12-09 401 if (priv->init) fbc4a8a85777e06 John Ogness 2014-12-09 402 priv->init(info); fbc4a8a85777e06 John Ogness 2014-12-09 403 fbc4a8a85777e06 John Ogness 2014-12-09 404 /* register UIO device */ fbc4a8a85777e06 John Ogness 2014-12-09 405 if (uio_register_device(priv->dev, info) != 0) { fbc4a8a85777e06 John Ogness 2014-12-09 406 dev_err(priv->dev, "UIO registration failed\n"); fbc4a8a85777e06 John Ogness 2014-12-09 407 ret = -ENODEV; fbc4a8a85777e06 John Ogness 2014-12-09 408 goto out_err2; fbc4a8a85777e06 John Ogness 2014-12-09 409 } fbc4a8a85777e06 John Ogness 2014-12-09 410 fbc4a8a85777e06 John Ogness 2014-12-09 411 /* store private data */ fbc4a8a85777e06 John Ogness 2014-12-09 412 platform_set_drvdata(pdev, info); fbc4a8a85777e06 John Ogness 2014-12-09 413 fbc4a8a85777e06 John Ogness 2014-12-09 414 dev_info(priv->dev, fbc4a8a85777e06 John Ogness 2014-12-09 415 "eLBC/GPCM device (%s) at 0x%llx, bank %d, irq=%d\n", c8295feb756f5e3 Rosen Penev 2026-07-22 416 priv->name, (unsigned long long)res->start, priv->bank, e48031603ae6440 Christophe Leroy 2022-10-06 417 irq ? : -1); fbc4a8a85777e06 John Ogness 2014-12-09 418 fbc4a8a85777e06 John Ogness 2014-12-09 419 return 0; fbc4a8a85777e06 John Ogness 2014-12-09 420 out_err2: fbc4a8a85777e06 John Ogness 2014-12-09 421 if (priv->shutdown) fbc4a8a85777e06 John Ogness 2014-12-09 422 priv->shutdown(info, true); fbc4a8a85777e06 John Ogness 2014-12-09 423 return ret; fbc4a8a85777e06 John Ogness 2014-12-09 424 } fbc4a8a85777e06 John Ogness 2014-12-09 425 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki