linux-kernel - [pinctrl-intel:review-andy 18/19] drivers/pinctrl/pinctrl-zynqmp.c:825:13: warning: variable 'pin' is uninitialized when used here

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Message-ID: <202111191618.SSj1gGvK-lkp@intel.com>
Date:   Fri, 19 Nov 2021 16:08:32 +0800
From:   kernel test robot <lkp@...el.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [pinctrl-intel:review-andy 18/19]
 drivers/pinctrl/pinctrl-zynqmp.c:825:13: warning: variable 'pin' is
 uninitialized when used here

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/intel.git review-andy
head:   c25441ca551164c56b34885df3d657e2ea4d623f
commit: 9122cda6a325f80564f02b7899cc063009f5e1f9 [18/19] pinctrl: zynqmp: Unify pin naming
config: arm64-buildonly-randconfig-r004-20211118 (attached as .config)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/intel.git/commit/?id=9122cda6a325f80564f02b7899cc063009f5e1f9
        git remote add pinctrl-intel https://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/intel.git
        git fetch --no-tags pinctrl-intel review-andy
        git checkout 9122cda6a325f80564f02b7899cc063009f5e1f9
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/pinctrl/pinctrl-zynqmp.c:825:13: warning: variable 'pin' is uninitialized when used here [-Wuninitialized]
           if (IS_ERR(pin->name))
                      ^~~
   drivers/pinctrl/pinctrl-zynqmp.c:811:37: note: initialize the variable 'pin' to silence this warning
           struct pinctrl_pin_desc *pins, *pin;
                                              ^
                                               = NULL
   1 warning generated.


vim +/pin +825 drivers/pinctrl/pinctrl-zynqmp.c

   794	
   795	/**
   796	 * zynqmp_pinctrl_prepare_pin_desc() - prepare pin description info
   797	 * @dev:		Device pointer.
   798	 * @zynqmp_pins:	Pin information.
   799	 * @npins:		Number of pins.
   800	 *
   801	 * Query number of pins information from firmware and prepare pin
   802	 * description containing pin number and pin name.
   803	 *
   804	 * Return: 0 on success else error code.
   805	 */
   806	static int zynqmp_pinctrl_prepare_pin_desc(struct device *dev,
   807						   const struct pinctrl_pin_desc
   808						   **zynqmp_pins,
   809						   unsigned int *npins)
   810	{
   811		struct pinctrl_pin_desc *pins, *pin;
   812		char **pin_names;
   813		int ret;
   814		int i;
   815	
   816		ret = zynqmp_pinctrl_get_num_pins(npins);
   817		if (ret)
   818			return ret;
   819	
   820		pins = devm_kzalloc(dev, sizeof(*pins) * *npins, GFP_KERNEL);
   821		if (!pins)
   822			return -ENOMEM;
   823	
   824		pin_names = devm_kasprintf_strarray(dev, ZYNQMP_PIN_PREFIX, *npins);
 > 825		if (IS_ERR(pin->name))
   826			return PTR_ERR(pin_names);
   827	
   828		for (i = 0; i < *npins; i++) {
   829			pin = &pins[i];
   830			pin->number = i;
   831			pin->name = pin_names[i];
   832		}
   833	
   834		*zynqmp_pins = pins;
   835	
   836		return 0;
   837	}
   838	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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