On Tue 2023-03-28 23:53:16, John Ogness wrote: > On 2023-03-28, Petr Mladek <pmladek@xxxxxxxx> wrote: > >> If an atomic context loses ownership while doing certain activities, > >> it may need to re-acquire ownership in order to finish or cleanup > >> what it started. > > > > This sounds suspicious. If a console/writer context has lost the lock > > then all shared/locked resources might already be used by the new > > owner. > > Correct. > > > I would expect that the context could touch only non-shared resources > > after loosing the lock. > > Correct. > > The 8250 driver must disable interrupts before writing to the TX > FIFO. After writing it re-enables the interrupts. However, it might be > the case that the interrupts were already disabled, in which case after > writing they are left disabled. I see. The reacquire() makes sense now. Thanks a lot for explanation. Best Regards, Petr
