linux-kernel - Re: [PATCH v3 3/3] driver-core: print bus registration error value

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Message-ID: <201805161548.A49awWPk%fengguang.wu@intel.com>
Date:   Wed, 16 May 2018 16:35:37 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Florian Schmaus <flo@...kplace.eu>
Cc:     kbuild-all@...org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Florian Schmaus <flo@...kplace.eu>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/3] driver-core: print bus registration error value

Hi Florian,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on driver-core/driver-core-testing]
[also build test ERROR on v4.17-rc5 next-20180515]
[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/Florian-Schmaus/return-EINVAL-error-instead-of-BUG_ON/20180516-141149
config: i386-randconfig-a0-201819 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   drivers/base/driver.c: In function 'driver_register':
>> drivers/base/driver.c:154:26: error: 'struct bus_type' has no member named 'bus_register_retval'
          drv->name, drv->bus->bus_register_retval);
                             ^

vim +154 drivers/base/driver.c

   137	
   138	/**
   139	 * driver_register - register driver with bus
   140	 * @drv: driver to register
   141	 *
   142	 * We pass off most of the work to the bus_add_driver() call,
   143	 * since most of the things we have to do deal with the bus
   144	 * structures.
   145	 */
   146	int driver_register(struct device_driver *drv)
   147	{
   148		int ret;
   149		struct device_driver *other;
   150	
   151		if (!drv->bus->p) {
   152			printk(KERN_ERR "Driver '%s' was unable to register bus_type "
   153				   "(error: %d)\n",
 > 154				   drv->name, drv->bus->bus_register_retval);
   155			return -EINVAL;
   156		}
   157	
   158		if ((drv->bus->probe && drv->probe) ||
   159		    (drv->bus->remove && drv->remove) ||
   160		    (drv->bus->shutdown && drv->shutdown))
   161			printk(KERN_WARNING "Driver '%s' needs updating - please use "
   162				"bus_type methods\n", drv->name);
   163	
   164		other = driver_find(drv->name, drv->bus);
   165		if (other) {
   166			printk(KERN_ERR "Error: Driver '%s' is already registered, "
   167				"aborting...\n", drv->name);
   168			return -EBUSY;
   169		}
   170	
   171		ret = bus_add_driver(drv);
   172		if (ret)
   173			return ret;
   174		ret = driver_add_groups(drv, drv->groups);
   175		if (ret) {
   176			bus_remove_driver(drv);
   177			return ret;
   178		}
   179		kobject_uevent(&drv->p->kobj, KOBJ_ADD);
   180	
   181		return ret;
   182	}
   183	EXPORT_SYMBOL_GPL(driver_register);
   184	

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

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