[Intel-wired-lan] [PATCH net 3/5] net: lan743x: reject unsupported external timestamp requests

[Simon Horman]

On Mon, Mar 10, 2025 at 03:16:38PM -0700, Jacob Keller wrote:
> The lan743x_ptp_io_event_cap_en() function checks that the given request
> sets only one of PTP_RISING_EDGE or PTP_FALLING_EDGE, but not both.
> 
> However, this driver does not check whether other flags (such as
> PTP_EXT_OFF) are set, nor whether any future unrecognized flags are set.
> 
> Fix this by adding the appropriate check to the lan743x_ptp_io_extts()
> function.
> 
> Fixes: 60942c397af6 ("net: lan743x: Add support for PTP-IO Event Input External Timestamp (extts)")
> Signed-off-by: Jacob Keller <jacob.e.keller at intel.com>

Reviewed-by: Simon Horman <horms at kernel.org>