linux-kernel - Re: [RFC PATCH 4/5] PTP: Add flag for non-periodic output

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Date:   Wed, 14 Aug 2019 10:05:34 +0300
From:   Felipe Balbi <felipe.balbi@...ux.intel.com>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     netdev@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org,
        "Christopher S . Hall" <christopher.s.hall@...el.com>
Subject: Re: [RFC PATCH 4/5] PTP: Add flag for non-periodic output


Hi,

Richard Cochran <richardcochran@...il.com> writes:

> On Tue, Aug 13, 2019 at 10:48:21AM -0700, Richard Cochran wrote:
>> > +		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]) {
>> > +			err = -EINVAL;
>> 
>> Since the code is mostly the same as in the PTP_EXTTS_REQUEST case,
>> maybe just double up the case statements (like in the other) and add
>> an extra test for (cmd == PTP_EXTTS_REQUEST2) for this if-block.
>
> Thinking about the drivers, in the case of the legacy ioctls, let's
> also be sure to clear the flags and reserved fields before passing
> them to the drivers.

makes sense to me. I'll update per your requests and send only this
patch officially. Thanks for the pointers.

-- 
balbi

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