linux-kernel - Re: [PATCH v12 4/5] watchdog: Add RAVE SP watchdog driver

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Message-ID: <201711130055.JLtjy3iw%fengguang.wu@intel.com>
Date:   Mon, 13 Nov 2017 01:03:40 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Andrey Smirnov <andrew.smirnov@...il.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        linux-watchdog@...r.kernel.org, cphealy@...il.com,
        Lucas Stach <l.stach@...gutronix.de>,
        Nikita Yushchenko <nikita.yoush@...entembedded.com>,
        Lee Jones <lee.jones@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Pavel Machek <pavel@....cz>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Rob Herring <robh@...nel.org>, Johan Hovold <johan@...nel.org>,
        Sebastian Reichel <sebastian.reichel@...labora.co.uk>
Subject: Re: [PATCH v12 4/5] watchdog: Add RAVE SP watchdog driver

Hi Andrey,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.14-rc8]
[cannot apply to next-20171110]
[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/Andrey-Smirnov/ZII-RAVE-platform-driver/20171112-215306
config: blackfin-allyesconfig (attached as .config)
compiler: bfin-uclinux-gcc (GCC) 6.2.0
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=blackfin 

All errors (new ones prefixed by >>):

   drivers/watchdog/rave-sp-wdt.c: In function 'rave_sp_wdt_probe':
>> drivers/watchdog/rave-sp-wdt.c:314:8: error: implicit declaration of function 'devm_register_reboot_notifier' [-Werror=implicit-function-declaration]
     ret = devm_register_reboot_notifier(dev, &sp_wd->reboot_notifier);
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/devm_register_reboot_notifier +314 drivers/watchdog/rave-sp-wdt.c

   265	
   266	static int rave_sp_wdt_probe(struct platform_device *pdev)
   267	{
   268		struct device *dev = &pdev->dev;
   269		const struct of_device_id *id;
   270		struct watchdog_device *wdd;
   271		struct rave_sp_wdt *sp_wd;
   272		struct nvmem_cell *cell;
   273		__le16 timeout = 0;
   274		int ret;
   275	
   276		id = of_match_device(rave_sp_wdt_variants, dev->parent);
   277		if (!id) {
   278			dev_err(dev, "Unknown parent device variant. Bailing out\n");
   279			return -ENODEV;
   280		}
   281	
   282		sp_wd = devm_kzalloc(dev, sizeof(*sp_wd), GFP_KERNEL);
   283		if (!sp_wd)
   284			return -ENOMEM;
   285	
   286		sp_wd->variant = id->data;
   287		sp_wd->sp      = dev_get_drvdata(dev->parent);
   288	
   289		wdd              = &sp_wd->wdd;
   290		wdd->parent      = dev;
   291		wdd->info        = &rave_sp_wdt_info;
   292		wdd->ops         = &rave_sp_wdt_ops;
   293		wdd->min_timeout = sp_wd->variant->min_timeout;
   294		wdd->max_timeout = sp_wd->variant->max_timeout;
   295		wdd->status      = WATCHDOG_NOWAYOUT_INIT_STATUS;
   296		wdd->timeout     = 60;
   297	
   298		cell = nvmem_cell_get(dev, "wdt-timeout");
   299		if (!IS_ERR(cell)) {
   300			size_t len;
   301			void *value = nvmem_cell_read(cell, &len);
   302	
   303			if (!IS_ERR(value)) {
   304				memcpy(&timeout, value, min(len, sizeof(timeout)));
   305				kfree(value);
   306			}
   307			nvmem_cell_put(cell);
   308		}
   309		watchdog_init_timeout(wdd, le16_to_cpu(timeout), dev);
   310		watchdog_set_restart_priority(wdd, 255);
   311		watchdog_stop_on_unregister(wdd);
   312	
   313		sp_wd->reboot_notifier.notifier_call = rave_sp_wdt_reboot_notifier;
 > 314		ret = devm_register_reboot_notifier(dev, &sp_wd->reboot_notifier);
   315		if (ret) {
   316			dev_err(dev, "Failed to register reboot notifier\n");
   317			return ret;
   318		}
   319	
   320		/*
   321		 * We don't know if watchdog is running now. To be sure, let's
   322		 * start it and depend on watchdog core to ping it
   323		 */
   324		wdd->max_hw_heartbeat_ms = wdd->max_timeout * 1000;
   325		ret = rave_sp_wdt_start(wdd);
   326		if (ret) {
   327			dev_err(dev, "Watchdog didn't start\n");
   328			return ret;
   329		}
   330	
   331		ret = devm_watchdog_register_device(dev, wdd);
   332		if (ret) {
   333			dev_err(dev, "Failed to register watchdog device\n");
   334			rave_sp_wdt_stop(wdd);
   335			return ret;
   336		}
   337	
   338		return 0;
   339	}
   340	

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