Re: [PATCH v14 1/5] lightnvm: Support for Open-Channel SSDs

["Matias Bjørling" <m@bjorling.me>]

On 11/11/2015 11:46 PM, Geert Uytterhoeven wrote:
> On Wed, Oct 28, 2015 at 7:54 PM, Matias Bjørling <m@bjorling.me> wrote:
>> +struct nvm_dev_ops {
>
> [...]
>
>> +       uint8_t                 max_phys_sect;
>> +};
>
>> --- /dev/null
>> +++ b/drivers/lightnvm/core.c
>
>> +int nvm_register(struct request_queue *q, char *disk_name,
>> +                                                       struct nvm_dev_ops *ops)
>> +{
>
> [...]
>
>> +       } else if (dev->ops->max_phys_sect > 256) {
>
> drivers/nfc/nfcmrvl/i2c.c:52: warning: comparison is always false due
> to limited range of data type
>
> Indeed, max_phys_sect is "uint8_t", so its maximum value is 255.
>
>> +               pr_info("nvm: max sectors supported is 256.\n");
>
> Hence this message is not correct. What's the intended maximum value?
> 255 or 256?

Good catch. It'll be 256, the typically device driver supports 64. The 
256 is just an upper sensible bound. I'll create a patch to make it an 
unsigned short.

Thanks