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Petr Machata authored
Before mlxsw_sp1_ptp_packet_finish() sends the packet back, it validates whether the corresponding port is still valid. However the condition is incorrect: when mlxsw_sp_port == NULL, the code dereferences the port to compare it to skb->dev. The condition needs to check whether the port is present and skb->dev still refers to that port (or else is NULL). If that does not hold, bail out. Add a pair of parentheses to fix the condition. Fixes: d92e4e6e ("mlxsw: spectrum: PTP: Support timestamping on Spectrum-1") Reported-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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