> Hi, Hi Steffen.
> > I have seen a similar problem for the 2.4.20. > > When I force a lot of console output via the following command: > > while true; do cd /; ls -R; done > > and type-in some letters in parallel, the console > becomes crazy. My custom mpc860 also becomes crazy or just locks up when I do this. The drivers are pretty the same, so this is no surprise. > > I have added some instrumentation in order to dump the > TX Buffer Descriptor Table. I have found that the > hardware pointer (TBPTR) and the software pointer (tx_cur) > are not more synchronized together: > Inside uart.c, there are the following output routines: [SNIP] > > rs_8xx_put_char() > rs_8xx_write() > rs_8xx_send_xchar() > my_console_write() > > I think there must be a synchronization accessing the > TX BD table. I suggest the patch attached. Hmm, don't you turn off irq's for a long time with this patch? Jocke ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
