drivers/gpio/gpio-davinci.c:599 davinci_gpio_save_context() error: potentially dereferencing uninitialized 'g'.

drivers/gpio/gpio-davinci.c:599 davinci_gpio_save_context() error: potentially dereferencing uninitialized 'g'.

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
CC: Linus Walleij <linus.walleij@linaro.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9b2ffa6148b1e4468d08f7e0e7e371c43cac9ffe
commit: 56d6ff4b8faf1c2d5c850ed8b4e5dfa6cd81413b gpio: davinci: allow building the module with COMPILE_TEST=y
date:   2 months ago
:::::: branch date: 2 days ago
:::::: commit date: 2 months ago
config: sh-randconfig-r071-20241225 (https://download.01.org/0day-ci/archive/20241226/202412261936.Ab2roJgJ-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 14.2.0

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/202412261936.Ab2roJgJ-lkp@intel.com/

smatch warnings:
drivers/gpio/gpio-davinci.c:599 davinci_gpio_save_context() error: potentially dereferencing uninitialized 'g'.

vim +/g +599 drivers/gpio/gpio-davinci.c

118150f22d6b44 KV Sujith       2013-08-18  577  
0651a730924b17 Devarsh Thakkar 2022-06-13  578  static void davinci_gpio_save_context(struct davinci_gpio_controller *chips,
0651a730924b17 Devarsh Thakkar 2022-06-13  579  				      u32 nbank)
0651a730924b17 Devarsh Thakkar 2022-06-13  580  {
0651a730924b17 Devarsh Thakkar 2022-06-13  581  	struct davinci_gpio_regs __iomem *g;
0651a730924b17 Devarsh Thakkar 2022-06-13  582  	struct davinci_gpio_regs *context;
0651a730924b17 Devarsh Thakkar 2022-06-13  583  	u32 bank;
0651a730924b17 Devarsh Thakkar 2022-06-13  584  	void __iomem *base;
0651a730924b17 Devarsh Thakkar 2022-06-13  585  
0651a730924b17 Devarsh Thakkar 2022-06-13  586  	base = chips->regs[0] - offset_array[0];
0651a730924b17 Devarsh Thakkar 2022-06-13  587  	chips->binten_context = readl_relaxed(base + BINTEN);
0651a730924b17 Devarsh Thakkar 2022-06-13  588  
0651a730924b17 Devarsh Thakkar 2022-06-13  589  	for (bank = 0; bank < nbank; bank++) {
0651a730924b17 Devarsh Thakkar 2022-06-13  590  		g = chips->regs[bank];
0651a730924b17 Devarsh Thakkar 2022-06-13  591  		context = &chips->context[bank];
0651a730924b17 Devarsh Thakkar 2022-06-13  592  		context->dir = readl_relaxed(&g->dir);
0651a730924b17 Devarsh Thakkar 2022-06-13  593  		context->set_data = readl_relaxed(&g->set_data);
0651a730924b17 Devarsh Thakkar 2022-06-13  594  		context->set_rising = readl_relaxed(&g->set_rising);
0651a730924b17 Devarsh Thakkar 2022-06-13  595  		context->set_falling = readl_relaxed(&g->set_falling);
0651a730924b17 Devarsh Thakkar 2022-06-13  596  	}
0651a730924b17 Devarsh Thakkar 2022-06-13  597  
0651a730924b17 Devarsh Thakkar 2022-06-13  598  	/* Clear all interrupt status registers */
0651a730924b17 Devarsh Thakkar 2022-06-13 @599  	writel_relaxed(GENMASK(31, 0), &g->intstat);
0651a730924b17 Devarsh Thakkar 2022-06-13  600  }
0651a730924b17 Devarsh Thakkar 2022-06-13  601  

:::::: The code at line 599 was first introduced by commit
:::::: 0651a730924b172476f67c7c6e01e898f84cd8f3 gpio: davinci: Add support for system suspend/resume PM

:::::: TO: Devarsh Thakkar <devarsht@ti.com>
:::::: CC: Bartosz Golaszewski <brgl@bgdev.pl>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki