drivers/comedi/drivers/ni_daq_700.c:163:17: sparse: sparse: cast to restricted __le16

From: kernel test robot
Date: Mon Dec 11 2023 - 21:46:05 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 26aff849438cebcd05f1a647390c4aa700d5c0f1
commit: 30b5e6ef4a32ea4985b99200e06d6660a69f9246 m68k: atari: Make Atari ROM port I/O write macros return void
date: 1 year, 7 months ago
config: m68k-randconfig-r131-20231119 (https://download.01.org/0day-ci/archive/20231212/202312121026.69R96xQ2-lkp@xxxxxxxxx/config)
compiler: m68k-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231212/202312121026.69R96xQ2-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312121026.69R96xQ2-lkp@xxxxxxxxx/

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@xxxxxxxxxxxxx>
:::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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Next message: Yong Wu: "[PATCH v3 0/7] dma-buf: heaps: Add secure heap"
Previous message: David Collins: "Re: [PATCH 3/4] regulator: qcom-rpmh: add support for pm8010 regulators"
Next in thread: kernel test robot: "drivers/comedi/drivers/ni_daq_700.c:163:17: sparse: sparse: cast to restricted __le16"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]