[PATCH v2] mtd: rawnand: mark expected switch fall-throughs

Gustavo A. R. Silva gustavo at embeddedor.com
Thu Apr 11 11:30:31 PDT 2019


Hi Miquel,

On 2/5/19 6:55 AM, Miquel Raynal wrote:
[..]
>> @@ -3280,12 +3280,14 @@ static void onenand_check_features(struct mtd_info *mtd)
>>  			if ((this->version_id & 0xf) == 0xe)
>>  				this->options |= ONENAND_HAS_NOP_1;
>>  		}
>> +		/* fall through */
>>  
>>  	case ONENAND_DEVICE_DENSITY_2Gb:
>>  		/* 2Gb DDP does not have 2 plane */
>>  		if (!ONENAND_IS_DDP(this))
>>  			this->options |= ONENAND_HAS_2PLANE;
>>  		this->options |= ONENAND_HAS_UNLOCK_ALL;
>> +		/* fall through */
> 
> This looks strange.
> 
> In ONENAND_DEVICE_DENSITY_2Gb:
> ONENAND_HAS_UNLOCK_ALL is set unconditionally.
> 
> But then, under ONENAND_DEVICE_DENSITY_1Gb, the same option is set only
> if process is evaluated to true.
> 
> Same problem with ONENAND_HAS_2PLANE:
> - it is set in ONENAND_DEVICE_DENSITY_4Gb only if ONENAND_IS_DDP()
> - it is unset in ONENAND_DEVICE_DENSITY_2Gb only if !ONENAND_IS_DDP()
> 
> Maybe this portion should be reworked because I am unsure if this is a
> missing fall through or a bug.
> 

I wonder if you had the chance to take a look into this piece of code.

Thanks
--
Gustavo



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