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34f3ff52cb
Commit15faa1f67a("lan966x: Fix crash when adding interface under a lag") fixed a similar issue in the lan966x driver caused by a NULL pointer dereference. The ocelot_set_aggr_pgids() function in the ocelot driver has similar logic and is susceptible to the same crash. This issue specifically affects the ocelot_vsc7514.c frontend, which leaves unused ports as NULL pointers. The felix_vsc9959.c frontend is unaffected as it uses the DSA framework which registers all ports. Fix this by checking if the port pointer is valid before accessing it. Fixes:528d3f190c("net: mscc: ocelot: drop the use of the "lags" array") Signed-off-by: Jerry Wu <w.7erry@foxmail.com> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Link: https://patch.msgid.link/tencent_75EF812B305E26B0869C673DD1160866C90A@qq.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>