[openeuler:openEuler-1.0-LTS 15530/22010] drivers/iommu/dmar.c:750 dmar_acpi_bus_add_dev() error: uninitialized symbol 'ret'.

[openeuler:openEuler-1.0-LTS 15530/22010] drivers/iommu/dmar.c:750 dmar_acpi_bus_add_dev() error: uninitialized symbol 'ret'.

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: kernel@openeuler.org
TO: Cheng Jian <cj.chengjian@huawei.com>

tree:   https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head:   6726609c5990ede3a9fdb318d1dc759d03678a1a
commit: 0f7d0c8b66a415734cbd2c8a7afc586c4a1d61cc [15530/22010] iommu/vt-d:Add support for detecting ACPI device in RMRR
:::::: branch date: 26 hours ago
:::::: commit date: 3 years ago
config: x86_64-randconfig-161-20240329 (https://download.01.org/0day-ci/archive/20240331/202403311708.wZJ05bN5-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)

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>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202403311708.wZJ05bN5-lkp@intel.com/

smatch warnings:
drivers/iommu/dmar.c:750 dmar_acpi_bus_add_dev() error: uninitialized symbol 'ret'.

vim +/ret +750 drivers/iommu/dmar.c

0f7d0c8b66a415 LeoLiu-oc       2021-04-07  732  
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  733  static int dmar_acpi_bus_add_dev(u8 device_number, struct acpi_device *adev)
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  734  {
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  735  	struct dmar_drhd_unit *dmaru;
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  736  	struct acpi_dmar_hardware_unit *drhd;
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  737  	int ret;
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  738  
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  739  	for_each_drhd_unit(dmaru) {
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  740  		drhd = container_of(dmaru->hdr,
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  741  				    struct acpi_dmar_hardware_unit,
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  742  				    header);
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  743  
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  744  		ret = dmar_acpi_insert_dev_scope(device_number, adev, (void *)(drhd+1),
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  745  						((void *)drhd)+drhd->header.length,
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  746  						dmaru->devices, dmaru->devices_cnt);
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  747  		if (ret)
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  748  			break;
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  749  	}
0f7d0c8b66a415 LeoLiu-oc       2021-04-07 @750  	if (ret > 0)
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  751  		ret = dmar_rmrr_add_acpi_dev(device_number, adev);
0f7d0c8b66a415 LeoLiu-oc       2021-04-07  752  	return ret;
ed40356b5fcf1c David Woodhouse 2014-03-07  753  }
ed40356b5fcf1c David Woodhouse 2014-03-07  754  

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