Re: [PATCH 2/2] ASoC: nau8821: Improve AMIC recording performance.

[kernel test robot <lkp@intel.com>]

Hi Seven,

kernel test robot noticed the following build warnings:

[auto build test WARNING on broonie-sound/for-next]
[also build test WARNING on next-20230816]
[cannot apply to linus/master v6.5-rc6]
[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/Seven-Lee/ASoC-nau8821-Improve-AMIC-recording-performance/20230816-160236
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
patch link:    https://lore.kernel.org/r/20230816080006.1624342-2-wtli%40nuvoton.com
patch subject: [PATCH 2/2] ASoC: nau8821: Improve AMIC recording performance.
config: hexagon-randconfig-r003-20230816 (https://download.01.org/0day-ci/archive/20230816/202308161844.humS3QWm-lkp@intel.com/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce: (https://download.01.org/0day-ci/archive/20230816/202308161844.humS3QWm-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/202308161844.humS3QWm-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from sound/soc/codecs/nau8821.c:15:
   In file included from include/linux/i2c.h: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:13:
   In file included from include/linux/cgroup.h:26:
   In file included from include/linux/kernel_stat.h:9:
   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:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __raw_readb(PCI_IOBASE + addr);
                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           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'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from sound/soc/codecs/nau8821.c:15:
   In file included from include/linux/i2c.h: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:13:
   In file included from include/linux/cgroup.h:26:
   In file included from include/linux/kernel_stat.h:9:
   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:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           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'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from sound/soc/codecs/nau8821.c:15:
   In file included from include/linux/i2c.h: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:13:
   In file included from include/linux/cgroup.h:26:
   In file included from include/linux/kernel_stat.h:9:
   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:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writeb(value, PCI_IOBASE + addr);
                               ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
>> sound/soc/codecs/nau8821.c:649:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           default:
           ^
   sound/soc/codecs/nau8821.c:649:2: note: insert 'break;' to avoid fall-through
           default:
           ^
           break; 
   7 warnings generated.


vim +649 sound/soc/codecs/nau8821.c

   626	
   627	static int nau8821_left_fepga_event(struct snd_soc_dapm_widget *w,
   628			struct snd_kcontrol *kcontrol, int event)
   629	{
   630		struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
   631		struct nau8821 *nau8821 = snd_soc_component_get_drvdata(component);
   632	
   633		if (!nau8821->left_input_single_end)
   634			return 0;
   635	
   636		switch (event) {
   637		case SND_SOC_DAPM_POST_PMU:
   638			regmap_update_bits(nau8821->regmap, NAU8821_R77_FEPGA,
   639				NAU8821_ACDC_CTRL_MASK | NAU8821_FEPGA_MODEL_MASK,
   640				NAU8821_ACDC_VREF_MICN | NAU8821_FEPGA_MODEL_AAF);
   641			regmap_update_bits(nau8821->regmap, NAU8821_R76_BOOST,
   642				NAU8821_HP_BOOST_DISCHRG_EN, NAU8821_HP_BOOST_DISCHRG_EN);
   643			break;
   644		case SND_SOC_DAPM_POST_PMD:
   645			regmap_update_bits(nau8821->regmap, NAU8821_R77_FEPGA,
   646				NAU8821_ACDC_CTRL_MASK | NAU8821_FEPGA_MODEL_MASK, 0);
   647			regmap_update_bits(nau8821->regmap, NAU8821_R76_BOOST,
   648				NAU8821_HP_BOOST_DISCHRG_EN, 0);
 > 649		default:
   650			break;
   651		}
   652	
   653		return 0;
   654	}
   655	

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