Re: [PATCH v5 3/3] drivers: iio: adc: add support for ad777x family

kernel test robot
2024-09-14T01:44:41Z

Hi Ramona,

kernel test robot noticed the following build warnings:

[auto build test WARNING on jic23-iio/togreg]
[also build test WARNING on robh/for-next linus/master v6.11-rc7 next-20240913]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Ramona-Alexandra-Nechita/dt-bindings-iio-adc-add-a7779-doc/20240912-201936
base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link: https://lore.kernel.org/r/20240912121609.13438-4-ramona.nechita%40analog.com
patch subject: [PATCH v5 3/3] drivers: iio: adc: add support for ad777x family
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20240914/202409140955.bz1rH7Q6-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project bf684034844c660b778f0eba103582f582b710c9)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240914/202409140955.bz1rH7Q6-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409140955.bz1rH7Q6-lkp@intel.com/

All warnings (new ones prefixed by >>):

In file included from drivers/iio/adc/ad7779.c:15:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:14:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
548 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
561 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
| ^
In file included from drivers/iio/adc/ad7779.c:15:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:14:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
574 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
| ^
In file included from drivers/iio/adc/ad7779.c:15:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:14:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
585 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
595 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
605 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
In file included from drivers/iio/adc/ad7779.c:19:
In file included from include/linux/regulator/consumer.h:35:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:21:
In file included from include/linux/mm.h:2232:
include/linux/vmstat.h:517:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
517 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
>> drivers/iio/adc/ad7779.c:748:35: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
748 | return dev_err_probe(&spi->dev, ret,
| ^~~
drivers/iio/adc/ad7779.c:735:9: note: initialize the variable 'ret' to silence this warning
735 | int ret;
| ^
| = 0
8 warnings generated.

vim +/ret +748 drivers/iio/adc/ad7779.c

729
730 static int ad7779_probe(struct spi_device *spi)
731 {
732 struct iio_dev *indio_dev;
733 struct ad7779_state *st;
734 struct gpio_desc *reset_gpio, *start_gpio;
735 int ret;
736
737 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
738 if (!indio_dev)
739 return -ENOMEM;
740
741 st = iio_priv(indio_dev);
742
743 st->mclk = devm_clk_get_enabled(&spi->dev, "mclk");
744 if (IS_ERR(st->mclk))
745 return PTR_ERR(st->mclk);
746
747 if (!spi->irq)
> 748 return dev_err_probe(&spi->dev, ret,
749 "DRDY irq not present\n");
750
751 reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_LOW);
752 if (IS_ERR(reset_gpio))
753 return PTR_ERR(reset_gpio);
754
755 start_gpio = devm_gpiod_get(&spi->dev, "start", GPIOD_OUT_HIGH);
756 if (IS_ERR(start_gpio))
757 return PTR_ERR(start_gpio);
758
759 crc8_populate_msb(ad7779_crc8_table, AD7779_CRC8_POLY);
760 st->spi = spi;
761
762 st->chip_info = spi_get_device_match_data(spi);
763 if (!st->chip_info)
764 return -ENODEV;
765
766 ret = ad7779_reset(indio_dev, reset_gpio);
767 if (ret)
768 return ret;
769
770 ad7779_powerup(st, start_gpio);
771 if (ret)
772 return ret;
773
774 indio_dev->name = st->chip_info->name;
775 indio_dev->info = &ad7779_info;
776 indio_dev->modes = INDIO_DIRECT_MODE;
777 indio_dev->channels = st->chip_info->channels;
778 indio_dev->num_channels = ARRAY_SIZE(ad7779_channels);
779
780 st->trig = devm_iio_trigger_alloc(&spi->dev, "%s-dev%d",
781 indio_dev->name, iio_device_id(indio_dev));
782 if (!st->trig)
783 return -ENOMEM;
784
785 st->trig->ops = &ad7779_trigger_ops;
786
787 iio_trigger_set_drvdata(st->trig, st);
788
789 ret = devm_request_irq(&spi->dev, spi->irq,
790 iio_trigger_generic_data_rdy_poll,
791 IRQF_ONESHOT | IRQF_NO_AUTOEN,
792 indio_dev->name, st->trig);
793 if (ret)
794 return dev_err_probe(&spi->dev, ret, "request irq %d failed\n",
795 st->spi->irq);
796
797 ret = devm_iio_trigger_register(&spi->dev, st->trig);
798 if (ret)
799 return ret;
800
801 indio_dev->trig = iio_trigger_get(st->trig);
802
803 init_completion(&st->completion);
804
805 ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
806 &iio_pollfunc_store_time,
807 &ad7779_trigger_handler,
808 &ad7779_buffer_setup_ops);
809 if (ret)
810 return ret;
811
812 ret = ad7779_spi_write_mask(st, AD7779_REG_DOUT_FORMAT,
813 AD7779_DCLK_CLK_DIV_MSK,
814 FIELD_PREP(AD7779_DCLK_CLK_DIV_MSK, 7));
815 if (ret)
816 return ret;
817
818 return devm_iio_device_register(&spi->dev, indio_dev);
819 }
820

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