[alsa-devel] Checkpatch warnings on switch case fallthru

Harvey, Ryan Ryan.Harvey at cirrus.com
Fri Apr 8 00:23:03 CEST 2016


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:


Thanks
-Ryan



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