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charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Feb 19, 2026 at 03:34:54PM +0100, Alexander Dahl wrote: > After upgrading from 6.12.57-rt14 to 6.12.66-rt15 on a custom at91 > sam9x60 based board with PREEMPT_RT patch, we noticed a complete > system lockup, which I bisected to this changeset. >=20 > After unplugging and plugging the ethernet cable, while > running PROFINET, system does not respond to anything anymore. > Last message in kernel log is: >=20 > [ +8.621919] macb f802c000.ethernet eth0: Link is Up - 100Mbps/Full - = flow control off >=20 > Heartbeat LED does not blink anymore, no network communication, > serial console does not respond anymore. >=20 > Reverting that change locally prevents the system lockup for me, but > what is the proper course of action on kernel side now? Send a revert > to stable? Send a revert to master? Please advise. >=20 > (I'm aware there were least two more patches on netdev referencing > this change, but if I'm not mistaken none of those made it to stable, > right?) A fix for this commit is available in the latest mainline kernel. Could you please verify whether it resolves the issue you encountered? https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit= /?id=3Dbf9cf80cab81e39701861a42877a28295ade266f Thanks, Kevin --6856BtWp9TLXFk0K Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEHc6qFoLCZqgJD98Zk1jtMN6usXEFAmmXI6gACgkQk1jtMN6u sXESiAf+Oh8BARZGMI/VqSRaUc6dV7NY0XuOD0Gmi08D6zj2md1+tp0b6R5ZVsG6 pz7CGsTnC0QOeFgy+TNK6eiM3zPhy4WdeMALkhAwW70klOb1+Zh8cul6r15CB2kq VzXjfgFnieLaRfvY9xGw59DEjKh/lKM9JJSlmhC9ddG/ZnlWGl9rBGmKJAIG9CYp A1qQNSVCBmtTKnySqjXoVjPds3nzCwmNe/7O1oUT/CYpcHDJ7QennTMHiOD8RHfU XHaTDFHuOkQqSwp4cZHuxRIeiEsOe7DW7k6IFHN5y/NEfIJQd+PdhhGQRMkWWi5v 4Mi5RCimm42LWUnZPn+YFr6cnD5F6A== =dMJ+ -----END PGP SIGNATURE----- --6856BtWp9TLXFk0K--