Re: [PATCH v2 1/2] PTP: introduce new versions of IOCTLs

[Felipe Balbi]

Hi,

Richard Cochran <richardcoch...@gmail.com> writes:
>> @@ -139,11 +141,24 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int 
>> cmd, unsigned long arg)
>>              break;
>>  
>>      case PTP_EXTTS_REQUEST:
>> +    case PTP_EXTTS_REQUEST2:
>> +            memset(&req, 0, sizeof(req));
>> +
>>              if (copy_from_user(&req.extts, (void __user *)arg,
>>                                 sizeof(req.extts))) {
>>                      err = -EFAULT;
>>                      break;
>>              }
>> +            if ((req.extts.flags || req.extts.rsv[0] || req.extts.rsv[1])
>> +                    && cmd == PTP_EXTTS_REQUEST2) {
>> +                    err = -EINVAL;
>> +                    break;
>> +            } else if (cmd == PTP_EXTTS_REQUEST) {
>> +                    req.extts.flags = 0;
>
> This still isn't quite right.  Sorry that was my fault.
>
> The req.extts.flags can be (PTP_ENABLE_FEATURE | PTP_RISING_EDGE |
> PTP_FALLING_EDGE), and ENABLE is used immediately below in this case.
>
> Please #define those bits into a valid mask, and then:
>
> - for PTP_EXTTS_REQUEST2 check that ~mask is zero, and
> - for PTP_EXTTS_REQUEST clear the ~mask bits for the drivers. 
>
> Thanks again for cleaning this up!

good point. This will actually reduce the size of the patch 2.

-- 
balbi

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