Hi, could you take this fix into 4.4? e9036d066236 tty: Drop krefs for interrupted tty lock And another one which is needed in versions >2.6.34 and <v4.12, but I haven't tried to apply to other than 4.4: 3c9101766b50 serial: sh-sci: Fix panic when serial console and DMA are enabled thanks, -- js suse labs