linux-kernel - [chenxing:msc313_mainlining 66/78] drivers/irqchip/irq-msc313-pm-wakeup.c:132:2: warning: ignoring return value of function declared with 'warn_unused

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Message-ID: <202112142011.TrAzr38n-lkp@intel.com>
Date:   Tue, 14 Dec 2021 20:51:55 +0800
From:   kernel test robot <lkp@...el.com>
To:     Daniel Palmer <daniel@...f.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [chenxing:msc313_mainlining 66/78]
 drivers/irqchip/irq-msc313-pm-wakeup.c:132:2: warning: ignoring return value
 of function declared with 'warn_unused_result' attribute

tree:   git://github.com/linux-chenxing/linux.git msc313_mainlining
head:   04c62a6ed8b1b9034464e903809c8b6a9354bf6e
commit: ef6b5b20ff3e51fa6026bc510f66980c5107698c [66/78] irqchip: MStar wakeup intc
config: hexagon-buildonly-randconfig-r002-20211214 (https://download.01.org/0day-ci/archive/20211214/202112142011.TrAzr38n-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project b6a2ddb6c8ac29412b1361810972e15221fa021c)
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
        # https://github.com/linux-chenxing/linux/commit/ef6b5b20ff3e51fa6026bc510f66980c5107698c
        git remote add chenxing git://github.com/linux-chenxing/linux.git
        git fetch --no-tags chenxing msc313_mainlining
        git checkout ef6b5b20ff3e51fa6026bc510f66980c5107698c
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/clocksource/ drivers/irqchip/

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/irqchip/irq-msc313-pm-wakeup.c:132:2: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
           request_irq(irq, msc313_pm_wakeup_intc_chainedhandler, IRQF_SHARED,
           ^~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +/warn_unused_result +132 drivers/irqchip/irq-msc313-pm-wakeup.c

    97	
    98	static int __init msc313_pm_wakeup_intc_of_init(struct device_node *node,
    99					   struct device_node *parent)
   100	{
   101		int ret = 0, irq;
   102		struct regmap *pmsleep;
   103		struct msc313_sleep_intc *intc;
   104		struct irq_domain *domain;
   105	
   106		irq = of_irq_get(node, 0);
   107		if (irq <= 0)
   108			return irq;
   109	
   110		pmsleep = syscon_regmap_lookup_by_phandle(node, "mstar,pmsleep");
   111		if (IS_ERR(pmsleep))
   112			return PTR_ERR(pmsleep);
   113	
   114		intc = kzalloc(sizeof(*intc), GFP_KERNEL);
   115		if (!intc)
   116			return -ENOMEM;
   117	
   118		intc->mask = regmap_field_alloc(pmsleep, field_mask);
   119		intc->type = regmap_field_alloc(pmsleep, field_type);
   120		intc->status = regmap_field_alloc(pmsleep, field_status);
   121	
   122		/* The masks survive deep sleep so clear them. */
   123		regmap_field_write(intc->mask, ~0);
   124	
   125		domain = irq_domain_add_linear(node, NUM_IRQ,
   126				&msc313_pm_wakeup_intc_domain_ops, intc);
   127		if (!domain) {
   128			ret = -ENOMEM;
   129			goto out_free;
   130		}
   131	
 > 132		request_irq(irq, msc313_pm_wakeup_intc_chainedhandler, IRQF_SHARED,
   133					"pmsleep", domain);
   134	
   135		return 0;
   136	
   137	out_free:
   138		kfree(intc);
   139		return ret;
   140	}
   141	

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