linux-kernel - Re: [PATCH 1/2] iio: light: Add support for vishay vcnl4035

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Message-ID: <201806282346.z3EjCFvh%fengguang.wu@intel.com>
Date:   Thu, 28 Jun 2018 23:35:49 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Parthiban Nallathambi <pn@...x.de>
Cc:     kbuild-all@...org, jic23@...nel.org, knaack.h@....de,
        lars@...afoo.de, pmeerw@...erw.net, robh+dt@...nel.org,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        mark.rutland@....com, devicetree@...r.kernel.org,
        matthias.bgg@...il.com, wd@...x.de, sbabic@...x.de, hs@...x.de,
        Parthiban Nallathambi <pn@...x.de>
Subject: Re: [PATCH 1/2] iio: light: Add support for vishay vcnl4035

Hi Parthiban,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on iio/togreg]
[also build test WARNING on v4.18-rc2 next-20180628]
[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/Parthiban-Nallathambi/iio-light-Add-support-for-vishay-vcnl4035/20180628-213034
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/iio/light/vcnl4035.c:136:28: sparse: cast to restricted __le16

vim +136 drivers/iio/light/vcnl4035.c

   115	
   116	static irqreturn_t vcnl4035_trigger_consumer_handler(int irq, void *p)
   117	{
   118		struct iio_poll_func *pf = p;
   119		struct iio_dev *indio_dev = pf->indio_dev;
   120		struct vcnl4035_data *data = iio_priv(indio_dev);
   121		int als_data;
   122		int ret;
   123	
   124		if (iio_trigger_using_own(indio_dev) && data->irq_timestamp) {
   125			pf->timestamp = data->irq_timestamp;
   126			data->irq_timestamp = 0;
   127		}
   128	
   129		if (!pf->timestamp)
   130			pf->timestamp = iio_get_time_ns(indio_dev);
   131	
   132		mutex_lock(&data->lock);
   133		ret = regmap_read(data->regmap, VCNL4035_ALS_DATA, &als_data);
   134		mutex_unlock(&data->lock);
   135		if (!ret) {
 > 136			als_data = le16_to_cpu(als_data);
   137			iio_push_to_buffers_with_timestamp(indio_dev,
   138							   &als_data,
   139							   pf->timestamp);
   140		} else
   141			dev_err(&data->client->dev,
   142				"Trigger consumer can't read from sensor.\n");
   143		pf->timestamp = 0;
   144	
   145		iio_trigger_notify_done(indio_dev->trig);
   146	
   147		return IRQ_HANDLED;
   148	}
   149	

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