drivers/of/unittest.c:1195 of_unittest_reg() error: uninitialized symbol 'addr'.

[kernel test robot <lkp@intel.com>]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Frank Rowand <frowand.list@gmail.com>
CC: Rob Herring <robh@kernel.org>
CC: Stephen Boyd <sboyd@kernel.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cf87f46fd34d6c19283d9625a7822f20d90b64a4
commit: 7b937cc243e5b1df8780a0aa743ce800df6c68d1 of: Create of_root if no dtb provided by firmware
date:   9 weeks ago
:::::: branch date: 24 hours ago
:::::: commit date: 9 weeks ago
config: sparc-randconfig-r081-20240512 (https://download.01.org/0day-ci/archive/20240512/202405120620.HFCq9U8K-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 13.2.0

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/202405120620.HFCq9U8K-lkp@intel.com/

New smatch warnings:
drivers/of/unittest.c:1195 of_unittest_reg() error: uninitialized symbol 'addr'.

Old smatch warnings:
drivers/of/unittest.c:854 of_unittest_changeset() error: potential null dereference 'n1'.  (__of_node_dup returns null)
drivers/of/unittest.c:855 of_unittest_changeset() error: potential null dereference 'n2'.  (__of_node_dup returns null)
drivers/of/unittest.c:856 of_unittest_changeset() error: potential null dereference 'n21'.  (__of_node_dup returns null)
drivers/of/unittest.c:1283 of_unittest_parse_interrupts() warn: bitwise AND condition is false here
drivers/of/unittest.c:1360 of_unittest_parse_interrupts_extended() warn: bitwise AND condition is false here
drivers/of/unittest.c:1522 of_unittest_platform_populate() warn: bitwise AND condition is false here

vim +/addr +1195 drivers/of/unittest.c

3d5089c4263d35 Rob Herring 2023-03-28  1179  
ff61bacd77f258 Rob Herring 2023-03-28  1180  static void __init of_unittest_reg(void)
ff61bacd77f258 Rob Herring 2023-03-28  1181  {
ff61bacd77f258 Rob Herring 2023-03-28  1182  	struct device_node *np;
ff61bacd77f258 Rob Herring 2023-03-28  1183  	int ret;
ff61bacd77f258 Rob Herring 2023-03-28  1184  	u64 addr, size;
ff61bacd77f258 Rob Herring 2023-03-28  1185  
ff61bacd77f258 Rob Herring 2023-03-28  1186  	np = of_find_node_by_path("/testcase-data/address-tests/bus@80000000/device@1000");
ff61bacd77f258 Rob Herring 2023-03-28  1187  	if (!np) {
ff61bacd77f258 Rob Herring 2023-03-28  1188  		pr_err("missing testcase data\n");
ff61bacd77f258 Rob Herring 2023-03-28  1189  		return;
ff61bacd77f258 Rob Herring 2023-03-28  1190  	}
ff61bacd77f258 Rob Herring 2023-03-28  1191  
ff61bacd77f258 Rob Herring 2023-03-28  1192  	ret = of_property_read_reg(np, 0, &addr, &size);
ff61bacd77f258 Rob Herring 2023-03-28  1193  	unittest(!ret, "of_property_read_reg(%pOF) returned error %d\n",
ff61bacd77f258 Rob Herring 2023-03-28  1194  		np, ret);
ff61bacd77f258 Rob Herring 2023-03-28 @1195  	unittest(addr == 0x1000, "of_property_read_reg(%pOF) untranslated address (%llx) incorrect\n",
ff61bacd77f258 Rob Herring 2023-03-28  1196  		np, addr);
ff61bacd77f258 Rob Herring 2023-03-28  1197  
ff61bacd77f258 Rob Herring 2023-03-28  1198  	of_node_put(np);
ff61bacd77f258 Rob Herring 2023-03-28  1199  }
ff61bacd77f258 Rob Herring 2023-03-28  1200  

:::::: The code at line 1195 was first introduced by commit
:::::: ff61bacd77f258bd2ed145efb69e5449b115d4fe of/address: Add of_property_read_reg() helper

:::::: TO: Rob Herring <robh@kernel.org>
:::::: CC: Rob Herring <robh@kernel.org>

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