On Wed, Apr 03, 2024 at 10:06:51AM +0200, Michael Walle wrote: > Vladimir, do you happen to know if some of your boards will use this > function? Just wondering because it was never noticed. > > -michael The SJA1110 uses the XPCS only for SGMII and 2500Base-X links. On the Bluebox3 I have (which is currently in a cardboard box for the time being, so I will have to rely on static analysis just like everybody else), these links are the cascade ports between switches. However, those cascade ports are only used for autonomous traffic bridging (the board has a weird "H" topology). Traffic terminated on the CPU doesn't go through the SGMII links, so this is why I haven't noticed it during casual testing. However, there are other NXP systems using downstream device trees which are likely impacted, but they are on older kernels and probably haven't seen the regression just yet. So the fix is welcome.
