linux-kernel - Re: [PATCH] mfd: cros-ec: Add cros_ec_readmem() helpers for I2C/SPI based ECs

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Message-ID: <201705091359.KEwXikan%fengguang.wu@intel.com>
Date:   Tue, 9 May 2017 13:56:14 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Moritz Fischer <mdf@...nel.org>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        linux@...ck-us.net, lee.jones@...aro.org, bleung@...omium.org,
        olof@...om.net, Moritz Fischer <mdf@...nel.org>
Subject: Re: [PATCH] mfd: cros-ec: Add cros_ec_readmem() helpers for I2C/SPI
 based ECs

Hi Moritz,

[auto build test WARNING on ljones-mfd/for-mfd-next]
[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/Moritz-Fischer/mfd-cros-ec-Add-cros_ec_readmem-helpers-for-I2C-SPI-based-ECs/20170509-040606
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
config: tile-allmodconfig
compiler: tilegx-linux-gcc (GCC) 4.6.2
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        make.cross ARCH=tile  allmodconfig
        make.cross ARCH=tile 

All warnings (new ones prefixed by >>):


vim +279 drivers/mfd/cros_ec.c

   263		return 0;
   264	}
   265	EXPORT_SYMBOL(cros_ec_resume);
   266	
   267	#endif
   268	
   269	int cros_ec_readmem(struct cros_ec_device *ec, unsigned int offset,
   270				   unsigned int bytes, void *dest)
   271	{
   272		int ret;
   273		struct ec_params_read_memmap *params;
   274		struct cros_ec_command *msg;
   275	
   276		if (offset >= EC_MEMMAP_SIZE - bytes)
   277			return -EINVAL;
   278	
 > 279		msg = kzalloc(sizeof(*msg) + max(sizeof(*params), bytes), GFP_KERNEL);
   280		if (!msg)
   281			return -ENOMEM;
   282	
   283		msg->version = 0;
   284		msg->command = EC_CMD_READ_MEMMAP;
   285		msg->insize = bytes;
   286		msg->outsize = sizeof(*params);
   287	

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