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Date: Thu, 1 Sep 2022 14:05:56 +0800
From: kernel test robot <lkp@...el.com>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Guenter Roeck <linux@...ck-us.net>,
Michael Schmitz <schmitzmic@...il.com>
Subject: drivers/comedi/drivers/ni_daq_700.c:163:17: sparse: sparse: cast to
restricted __le16
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: c5e4d5e99162ba8025d58a3af7ad103f155d2df7
commit: 30b5e6ef4a32ea4985b99200e06d6660a69f9246 m68k: atari: Make Atari ROM port I/O write macros return void
date: 3 months ago
config: m68k-randconfig-s043-20220831
compiler: m68k-linux-gcc (GCC) 12.1.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=30b5e6ef4a32ea4985b99200e06d6660a69f9246
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 30b5e6ef4a32ea4985b99200e06d6660a69f9246
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=m68k SHELL=/bin/bash drivers/comedi/drivers/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
>> drivers/comedi/drivers/ni_daq_700.c:163:17: sparse: sparse: cast to restricted __le16
>> drivers/comedi/drivers/ni_daq_700.c:163:17: sparse: sparse: cast to restricted __le16
>> drivers/comedi/drivers/ni_daq_700.c:163:17: sparse: sparse: cast to restricted __le16
>> drivers/comedi/drivers/ni_daq_700.c:163:17: sparse: sparse: cast to restricted __le16
drivers/comedi/drivers/ni_daq_700.c:173:21: sparse: sparse: cast to restricted __le16
drivers/comedi/drivers/ni_daq_700.c:173:21: sparse: sparse: cast to restricted __le16
drivers/comedi/drivers/ni_daq_700.c:173:21: sparse: sparse: cast to restricted __le16
drivers/comedi/drivers/ni_daq_700.c:173:21: sparse: sparse: cast to restricted __le16
drivers/comedi/drivers/ni_daq_700.c:205:9: sparse: sparse: cast to restricted __le16
drivers/comedi/drivers/ni_daq_700.c:205:9: sparse: sparse: cast to restricted __le16
drivers/comedi/drivers/ni_daq_700.c:205:9: sparse: sparse: cast to restricted __le16
drivers/comedi/drivers/ni_daq_700.c:205:9: sparse: sparse: cast to restricted __le16
vim +163 drivers/comedi/drivers/ni_daq_700.c
a9f9d831454114 drivers/staging/comedi/drivers/ni_daq_700.c H Hartley Sweeten 2014-02-10 129
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 130 static int daq700_ai_rinsn(struct comedi_device *dev,
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 131 struct comedi_subdevice *s,
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 132 struct comedi_insn *insn, unsigned int *data)
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 133 {
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 134 int n;
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 135 int d;
a9f9d831454114 drivers/staging/comedi/drivers/ni_daq_700.c H Hartley Sweeten 2014-02-10 136 int ret;
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 137 unsigned int chan = CR_CHAN(insn->chanspec);
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 138 unsigned int aref = CR_AREF(insn->chanspec);
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 139 unsigned int range = CR_RANGE(insn->chanspec);
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 140 unsigned int r3_bits = 0;
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 141
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 142 /* set channel input modes */
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 143 if (aref == AREF_DIFF)
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 144 r3_bits |= CMD_R3_DIFF;
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 145 /* write channel mode/range */
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 146 if (range >= 1)
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 147 range++; /* convert range to hardware value */
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 148 outb(r3_bits | (range & 0x03), dev->iobase + CMD_R3);
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 149
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 150 /* write channel to multiplexer */
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 151 /* set mask scan bit high to disable scanning */
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 152 outb(chan | 0x80, dev->iobase + CMD_R1);
ffed54dced8672 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2014-05-19 153 /* mux needs 2us to really settle [Fred Brooks]. */
ffed54dced8672 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2014-05-19 154 udelay(2);
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 155
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 156 /* convert n samples */
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 157 for (n = 0; n < insn->n; n++) {
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 158 /* trigger conversion with out0 L to H */
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 159 outb(0x00, dev->iobase + CMD_R2); /* enable ADC conversions */
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 160 outb(0x30, dev->iobase + CMO_R); /* mode 0 out0 L, from H */
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 161 outb(0x00, dev->iobase + ADCLEAR_R); /* clear the ADC FIFO */
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 162 /* read 16bit junk from FIFO to clear */
cf695df834efc7 drivers/staging/comedi/drivers/ni_daq_700.c Fred Brooks 2014-06-20 @163 inw(dev->iobase + ADFIFO_R);
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 164 /* mode 1 out0 H, L to H, start conversion */
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 165 outb(0x32, dev->iobase + CMO_R);
a9f9d831454114 drivers/staging/comedi/drivers/ni_daq_700.c H Hartley Sweeten 2014-02-10 166
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 167 /* wait for conversion to end */
a9f9d831454114 drivers/staging/comedi/drivers/ni_daq_700.c H Hartley Sweeten 2014-02-10 168 ret = comedi_timeout(dev, s, insn, daq700_ai_eoc, 0);
22ca19d93d92c7 drivers/staging/comedi/drivers/ni_daq_700.c H Hartley Sweeten 2014-02-10 169 if (ret)
a9f9d831454114 drivers/staging/comedi/drivers/ni_daq_700.c H Hartley Sweeten 2014-02-10 170 return ret;
a9f9d831454114 drivers/staging/comedi/drivers/ni_daq_700.c H Hartley Sweeten 2014-02-10 171
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 172 /* read data */
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 173 d = inw(dev->iobase + ADFIFO_R);
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 174 /* mangle the data as necessary */
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 175 /* Bipolar Offset Binary: 0 to 4095 for -10 to +10 */
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 176 d &= 0x0fff;
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 177 d ^= 0x0800;
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 178 data[n] = d;
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 179 }
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 180 return n;
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 181 }
198b0fa48b25b6 drivers/staging/comedi/drivers/ni_daq_700.c Ian Abbott 2012-09-21 182
:::::: The code at line 163 was first introduced by commit
:::::: cf695df834efc718b2ed17e9c83e127fd63c9033 staging: comedi: ni_daq_700: add AI range and input mode switching
:::::: TO: Fred Brooks <frederick.brooks@...rochip.com>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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