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SubjectRe: [PATCH 2/5] pinctrl: Add STMFX GPIO expander Pinctrl/GPIO driver
Hi Amelie,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on v4.16]
[cannot apply to next-20180411]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Amelie-Delaunay/Introduce-STMFX-I2C-GPIO-expander/20180412-082837
base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: sparc64-allyesconfig (attached as .config)
compiler: sparc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=sparc64

All warnings (new ones prefixed by >>):

drivers/pinctrl/pinctrl-stmfx.c: In function 'stmfx_resume':
>> drivers/pinctrl/pinctrl-stmfx.c:949:3: warning: ignoring return value of 'regulator_enable', declared with attribute warn_unused_result [-Wunused-result]
regulator_enable(stmfx->vdd);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/regulator_enable +949 drivers/pinctrl/pinctrl-stmfx.c

943
944 static int stmfx_resume(struct device *dev)
945 {
946 struct stmfx *stmfx = dev_get_drvdata(dev);
947
948 if (!IS_ERR(stmfx->vdd))
> 949 regulator_enable(stmfx->vdd);
950
951 /* Restore IRQ_OUT_PIN register */
952 stmfx_irq_init(stmfx);
953
954 /* Restore SYS_CTRL register */
955 stmfx_gpio_function_enable(stmfx, stmfx->pctl->gpio_chip.ngpio);
956
957 /* Restore all GPIO expander function relative registers */
958 stmfx_gpio_restore_regs(stmfx->pctl);
959
960 return 0;
961 }
962 #endif
963

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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