Re: [PATCH] soc/tegra: fuse: Register nvmem lookups at probe
From: kernel test robot
Date: Tue Mar 24 2026 - 22:37:56 EST
Hi Kartik,
kernel test robot noticed the following build warnings:
[auto build test WARNING on tegra/for-next]
[also build test WARNING on linus/master v7.0-rc5 next-20260324]
[cannot apply to drm-tegra/drm/tegra/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Kartik-Rajput/soc-tegra-fuse-Register-nvmem-lookups-at-probe/20260325-020016
base: https://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux.git for-next
patch link: https://lore.kernel.org/r/20260324114242.551939-1-kkartik%40nvidia.com
patch subject: [PATCH] soc/tegra: fuse: Register nvmem lookups at probe
config: arm-defconfig (https://download.01.org/0day-ci/archive/20260325/202603251045.wm2KjZbP-lkp@xxxxxxxxx/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 054e11d1a17e5ba88bb1a8ef32fad3346e80b186)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260325/202603251045.wm2KjZbP-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603251045.wm2KjZbP-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
>> drivers/soc/tegra/fuse/fuse-tegra.c:569:9: warning: variable 'err' is uninitialized when used here [-Wuninitialized]
569 | return err;
| ^~~
drivers/soc/tegra/fuse/fuse-tegra.c:476:9: note: initialize the variable 'err' to silence this warning
476 | int err;
| ^
| = 0
1 warning generated.
vim +/err +569 drivers/soc/tegra/fuse/fuse-tegra.c
7e939de1b2bb26 Thierry Reding 2015-04-29 521
7e939de1b2bb26 Thierry Reding 2015-04-29 522 default:
7e939de1b2bb26 Thierry Reding 2015-04-29 523 pr_warn("Unsupported SoC: %02x\n", chip);
7e939de1b2bb26 Thierry Reding 2015-04-29 524 break;
7e939de1b2bb26 Thierry Reding 2015-04-29 525 }
7e939de1b2bb26 Thierry Reding 2015-04-29 526 } else {
7e939de1b2bb26 Thierry Reding 2015-04-29 527 /*
7e939de1b2bb26 Thierry Reding 2015-04-29 528 * At this point we're not running on Tegra, so play
7e939de1b2bb26 Thierry Reding 2015-04-29 529 * nice with multi-platform kernels.
7e939de1b2bb26 Thierry Reding 2015-04-29 530 */
24fa5af81059af Thierry Reding 2014-07-11 531 return 0;
7e939de1b2bb26 Thierry Reding 2015-04-29 532 }
7e939de1b2bb26 Thierry Reding 2015-04-29 533 } else {
7e939de1b2bb26 Thierry Reding 2015-04-29 534 /*
7e939de1b2bb26 Thierry Reding 2015-04-29 535 * Extract information from the device tree if we've found a
7e939de1b2bb26 Thierry Reding 2015-04-29 536 * matching node.
7e939de1b2bb26 Thierry Reding 2015-04-29 537 */
7e939de1b2bb26 Thierry Reding 2015-04-29 538 if (of_address_to_resource(np, 0, ®s) < 0) {
7e939de1b2bb26 Thierry Reding 2015-04-29 539 pr_err("failed to get FUSE register\n");
7e939de1b2bb26 Thierry Reding 2015-04-29 540 return -ENXIO;
7e939de1b2bb26 Thierry Reding 2015-04-29 541 }
24fa5af81059af Thierry Reding 2014-07-11 542
7e939de1b2bb26 Thierry Reding 2015-04-29 543 fuse->soc = match->data;
7e939de1b2bb26 Thierry Reding 2015-04-29 544 }
783c8f4c84451b Peter De Schrijver 2014-06-12 545
783c8f4c84451b Peter De Schrijver 2014-06-12 546 np = of_find_matching_node(NULL, car_match);
7e939de1b2bb26 Thierry Reding 2015-04-29 547 if (np) {
7e939de1b2bb26 Thierry Reding 2015-04-29 548 void __iomem *base = of_iomap(np, 0);
e941712cccab8a Liang He 2022-06-16 549 of_node_put(np);
7e939de1b2bb26 Thierry Reding 2015-04-29 550 if (base) {
7e939de1b2bb26 Thierry Reding 2015-04-29 551 tegra_enable_fuse_clk(base);
7e939de1b2bb26 Thierry Reding 2015-04-29 552 iounmap(base);
783c8f4c84451b Peter De Schrijver 2014-06-12 553 } else {
7e939de1b2bb26 Thierry Reding 2015-04-29 554 pr_err("failed to map clock registers\n");
7e939de1b2bb26 Thierry Reding 2015-04-29 555 return -ENXIO;
7e939de1b2bb26 Thierry Reding 2015-04-29 556 }
7e939de1b2bb26 Thierry Reding 2015-04-29 557 }
7e939de1b2bb26 Thierry Reding 2015-04-29 558
4bdc0d676a6431 Christoph Hellwig 2020-01-06 559 fuse->base = ioremap(regs.start, resource_size(®s));
7e939de1b2bb26 Thierry Reding 2015-04-29 560 if (!fuse->base) {
7e939de1b2bb26 Thierry Reding 2015-04-29 561 pr_err("failed to map FUSE registers\n");
24fa5af81059af Thierry Reding 2014-07-11 562 return -ENXIO;
783c8f4c84451b Peter De Schrijver 2014-06-12 563 }
783c8f4c84451b Peter De Schrijver 2014-06-12 564
7e939de1b2bb26 Thierry Reding 2015-04-29 565 fuse->soc->init(fuse);
783c8f4c84451b Peter De Schrijver 2014-06-12 566
13a69354147e0a Kartik 2023-10-17 567 tegra_fuse_print_sku_info(&tegra_sku_info);
24fa5af81059af Thierry Reding 2014-07-11 568
71661c1c8c34d1 Kartik 2023-10-17 @569 return err;
783c8f4c84451b Peter De Schrijver 2014-06-12 570 }
24fa5af81059af Thierry Reding 2014-07-11 571 early_initcall(tegra_init_fuse);
27a0342ac162bf Thierry Reding 2017-08-17 572
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