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net: lan743x: reject unsupported external timestamp requests

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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: 60942c397a ("net: lan743x: Add support for PTP-IO Event Input External Timestamp (extts)")
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250312-jk-net-fixes-supported-extts-flags-v2-3-ea930ba82459@intel.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Jacob Keller 2025-03-12 15:15:52 -07:00 committed by Paolo Abeni
parent 51d58c0c79
commit c0b4ddd308
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/microchip/lan743x_ptp.c
View File

@ -942,6 +942,12 @@ static int lan743x_ptp_io_extts(struct lan743x_adapter *adapter, int on,
extts = &ptp->extts[index];
if (extts_request->flags & ~(PTP_ENABLE_FEATURE |
PTP_RISING_EDGE |
PTP_FALLING_EDGE |
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
if (on) {
extts_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_EXTTS, index);
if (extts_pin < 0)