[alsa-devel] Checkpatch warnings on switch case fallthru

[Joe Perches]

On Sat, 2016-04-09 at 18:07 +0200, Lars-Peter Clausen wrote:
> On 04/09/2016 11:06 AM, Takashi Iwai wrote:
> > 
> > On Fri, 08 Apr 2016 00:23:03 +0200,
> > Harvey, Ryan wrote:
> > > 
> > > 
> > > Hello,
> > > 
> > > I receive a set of checkpatch warnings against my switch fallthru
> > > structure in readable_registers().  I¹m able to eliminate these warnings
> > > with a preceding comment, but that does messy the code.  Is there a method
> > > better than switch for accomplishing this?
> > > 
> > > static bool cs43130_readable_register(struct device *dev, unsigned int reg)
> > > {
> > >         switch (reg) {
> > >         case CS43130_DEVID_AB ... CS43130_SYS_CLK_CTL_1:
> > >         case CS43130_PWDN_CTL:
> > >         case CS43130_PLL_SET_1 ... CS43130_PLL_SET_6:
> > >         case CS43130_PLL_SET_7:
> > >         case CS43130_PLL_SET_8:
> > >         case CS43130_PLL_SET_9:
> > >         case CS43130_PLL_SET_10:
> > >         case CS43130_CLKOUT_CTL:
> > >         case CS43130_ASP_NUM_1 ... CS43130_ASP_FRAME_CONF:
> > >         case CS43130_HP_OUT_CTL_1:
> > >         case CS43130_PCM_FILT_OPT ... CS43130_PCM_PATH_CTL_2:
> > >         case CS43130_CLASS_H_CTL:
> > >         case CS43130_HP_DETECT ... CS43130_HP_STATUS:
> > >         case CS43130_HP_LOAD_1:
> > >         case CS43130_HP_LOAD_STAT:
> > >         case CS43130_INT_MASK_1 ... CS43130_INT_MASK_5:
> > >                 return true;
> > >         default:
> > >                 return false;
> > >         }
> > > }
> > > 
> > > 
> > > 140: [WARNING] Possible switch case/default not preceeded by break or
> > > fallthrough comment
> > > +	case CS43130_PLL_SET_7:
> > > 141: [WARNING] Possible switch case/default not preceeded by break or
> > > fallthrough comment
> > > +	case CS43130_PLL_SET_8:
> > > 142: [WARNING] Possible switch case/default not preceeded by break or
> > > fallthrough comment
> > > +	case CS43130_PLL_SET_9:
> > > 143: [WARNING] Possible switch case/default not preceeded by break or
> > > fallthrough comment
> > > +	case CS43130_PLL_SET_10:
> > > 144: [WARNING] Possible switch case/default not preceeded by break or
> > > fallthrough comment
> > > +	case CS43130_CLKOUT_CTL:
> > > 152: [WARNING] Possible switch case/default not preceeded by break or
> > > fallthrough comment
> > > +	case CS43130_HP_OUT_CTL_1:
> > > 154: [WARNING] Possible switch case/default not preceeded by break or
> > > fallthrough comment
> > > +	case CS43130_CLASS_H_CTL:
> > > 156: [WARNING] Possible switch case/default not preceeded by break or
> > > fallthrough comment
> > > +	case CS43130_HP_LOAD_1:
> > > 160: [WARNING] Possible switch case/default not preceeded by break or
> > > fallthrough comment
> > > +	case CS43130_HP_LOAD_STAT:
> > You may ignore the warnings.  The purpose of checkpatch is to improve
> > the code readability, and what it suggests is exactly opposite.
> It's a bug in checkpatch. It seems to get confused by the "...". The
> best approach to solving those warnings is to create a fix for checkpatch.

Can you send me the checkpatch.pl file you are using please?