Sergei Shtylyov wrote: > Hello, I wrote: > > >>>> Here is a serial driver patch for the PMC-Sierra MSP71xx device. > > >>>> There are three different fixes: > >>>> 1. Fix for THRE errata > >>>> 2. Fix for Busy Detect on LCR write > >>>> 3. Workaround for interrupt/data concurrency issue > > >>>> The first fix is handled cleanly using a UART_BUG_* flag. > > >>> Hm, I wouldn't call it clean... > > >> Relative to the other two. Any recommended improvements on this one? > > > I already told: runtime check. > > BTW, I've just came accross 2 patches in the -mm tree related to the > transmitter bug: > > http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20-rc4/2.6.20-rc4-mm1/broken-out/8250-make-probing-for-txen-bug-a-config-option.patch Thanks. The first of these is not at all what we are seeing. However I guess there could be a remote chance it's triggering our THRE errata as it did for the pnx4008 boards. > http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20-rc4/2.6.20-rc4-mm1/broken-out/8250-uart-backup-timer.patch This second patch failure description is identical to what we are seeing without the THRE work-around. This must be the timer patch Alan mentioned but it's not in the linux.git at l-m.o. Could you please explain what you mean by and where I can find the "-mm tree"? Marc
