linux-kernel - Re: [PATCH v7 7/7] input: joystick: Add ADC attached joystick driver.

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Date:   Mon, 18 May 2020 07:19:26 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Artur Rojek <contact@...ur-rojek.eu>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jonathan Cameron <jic23@...nel.org>,
        Paul Cercueil <paul@...pouillou.net>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     kbuild-all@...ts.01.org, Heiko Stuebner <heiko@...ech.de>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Artur Rojek <contact@...ur-rojek.eu>
Subject: Re: [PATCH v7 7/7] input: joystick: Add ADC attached joystick driver.

Hi Artur,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on iio/togreg]
[also build test WARNING on input/next robh/for-next v5.7-rc5 next-20200515]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Artur-Rojek/dt-bindings-iio-adc-Convert-ingenic-adc-docs-to-YAML/20200518-035120
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: i386-allyesconfig (attached as .config)
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-193-gb8fad4bc-dirty
        # save the attached .config to linux build tree
        make C=1 ARCH=i386 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)

>> drivers/input/joystick/adc-joystick.c:49:39: sparse: sparse: cast to restricted __be16
>> drivers/input/joystick/adc-joystick.c:49:39: sparse: sparse: cast to restricted __be16
>> drivers/input/joystick/adc-joystick.c:49:39: sparse: sparse: cast to restricted __be16
>> drivers/input/joystick/adc-joystick.c:49:39: sparse: sparse: cast to restricted __be16
>> drivers/input/joystick/adc-joystick.c:51:39: sparse: sparse: cast to restricted __le16

vim +49 drivers/input/joystick/adc-joystick.c

    28	
    29	static int adc_joystick_handle(const void *data, void *private)
    30	{
    31		struct adc_joystick *joy = private;
    32		enum iio_endian endianness;
    33		int bytes, msb, val, i;
    34		bool sign;
    35	
    36		bytes = joy->chans[0].channel->scan_type.storagebits >> 3;
    37	
    38		for (i = 0; i < joy->num_chans; ++i) {
    39			endianness = joy->chans[i].channel->scan_type.endianness;
    40			msb = joy->chans[i].channel->scan_type.realbits - 1;
    41			sign = (tolower(joy->chans[i].channel->scan_type.sign) == 's');
    42	
    43			switch (bytes) {
    44			case 1:
    45				val = ((const u8 *)data)[i];
    46				break;
    47			case 2:
    48				if (endianness == IIO_BE)
  > 49					val = be16_to_cpu(((const u16 *)data)[i]);
    50				else if (endianness == IIO_LE)
  > 51					val = le16_to_cpu(((const u16 *)data)[i]);
    52				else /* IIO_CPU */
    53					val = ((const u16 *)data)[i];
    54				break;
    55			default:
    56				return -EINVAL;
    57			}
    58	
    59			val >>= joy->chans[i].channel->scan_type.shift;
    60			if (sign)
    61				val = sign_extend32(val, msb);
    62			else
    63				val &= GENMASK(msb, 0);
    64			input_report_abs(joy->input, joy->axes[i].code, val);
    65		}
    66	
    67		input_sync(joy->input);
    68	
    69		return 0;
    70	}
    71	

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

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