On Thu, Sep 26, 2019 at 11:11:04AM -0700, Jacob Keller wrote:
> Commit 823eb2a3c4c7 ("PTP: add support for one-shot output") introduced
> a new flag for the PTP periodic output request ioctl. This flag is not
> currently supported by any driver.
>
> Fix all drivers which implement the periodic output request ioctl to
> explicitly reject any request with flags they do not understand. This
> ensures that the driver does not accidentally misinterpret the
> PTP_PEROUT_ONE_SHOT flag, or any new flag introduced in the future.
>
> This is important for forward compatibility: if a new flag is
> introduced, the driver should reject requests to enable the flag until
> the driver has actually been modified to support the flag in question.
>
> Cc: Richard Cochran <[email protected]>
> Cc: Felipe Balbi <[email protected]>
> Cc: David S. Miller <[email protected]>
> Cc: Christopher Hall <[email protected]>
> Signed-off-by: Jacob Keller <[email protected]>
Reviewed-by: Richard Cochran <[email protected]>
