Re: [PATCH v2 1/4] drm/bridge: imx8qxp-pxl2dpi: Use dev_err_probe

kernel test robot
2025-01-08T11:13:17Z

Hi Alexander,

kernel test robot noticed the following build warnings:

[auto build test WARNING on shawnguo/for-next]
[also build test WARNING on linus/master v6.13-rc6 next-20250107]
[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/Alexander-Stein/drm-bridge-imx8qxp-pxl2dpi-Use-dev_err_probe/20250107-224125
base: https://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git for-next
patch link: https://lore.kernel.org/r/20250107143900.988567-2-alexander.stein%40ew.tq-group.com
patch subject: [PATCH v2 1/4] drm/bridge: imx8qxp-pxl2dpi: Use dev_err_probe
config: arm-randconfig-004-20250108 (https://download.01.org/0day-ci/archive/20250108/202501081822.A69smnpW-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250108/202501081822.A69smnpW-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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202501081822.A69smnpW-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:402:29: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
402 | return dev_err_probe(dev, ret, "failed to get regmap\n");
| ^~~
drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c:394:9: note: initialize the variable 'ret' to silence this warning
394 | int ret;
| ^
| = 0
1 warning generated.

vim +/ret +402 drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c

388
389 static int imx8qxp_pxl2dpi_bridge_probe(struct platform_device *pdev)
390 {
391 struct imx8qxp_pxl2dpi *p2d;
392 struct device *dev = &pdev->dev;
393 struct device_node *np = dev->of_node;
394 int ret;
395
396 p2d = devm_kzalloc(dev, sizeof(*p2d), GFP_KERNEL);
397 if (!p2d)
398 return -ENOMEM;
399
400 p2d->regmap = syscon_node_to_regmap(np->parent);
401 if (IS_ERR(p2d->regmap))
> 402 return dev_err_probe(dev, ret, "failed to get regmap\n");
403
404 ret = imx_scu_get_handle(&p2d->ipc_handle);
405 if (ret)
406 return dev_err_probe(dev, ret, "failed to get SCU ipc handle\n");
407
408 p2d->dev = dev;
409
410 ret = of_property_read_u32(np, "fsl,sc-resource", &p2d->sc_resource);
411 if (ret) {
412 DRM_DEV_ERROR(dev, "failed to get SC resource %d\n", ret);
413 return ret;
414 }
415
416 p2d->next_bridge = imx8qxp_pxl2dpi_find_next_bridge(p2d);
417 if (IS_ERR(p2d->next_bridge))
418 return dev_err_probe(dev, PTR_ERR(p2d->next_bridge),
419 "failed to find next bridge\n");
420
421 ret = imx8qxp_pxl2dpi_set_pixel_link_sel(p2d);
422 if (ret)
423 return ret;
424
425 ret = imx8qxp_pxl2dpi_parse_dt_companion(p2d);
426 if (ret)
427 return ret;
428
429 platform_set_drvdata(pdev, p2d);
430 pm_runtime_enable(dev);
431
432 p2d->bridge.driver_private = p2d;
433 p2d->bridge.funcs = &imx8qxp_pxl2dpi_bridge_funcs;
434 p2d->bridge.of_node = np;
435
436 drm_bridge_add(&p2d->bridge);
437
438 return ret;
439 }
440

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0-DAY CI Kernel Test Service