Problem of concurrency in arch/ppc/8260_io/uart.c

[Tom Rini]

On Sat, Sep 27, 2003 at 03:43:51PM +0200, Joakim Tjernlund wrote:
> > > If that freaks out the CPM, put one
> > > byte of zero into the buffer and give it a count of 1.  Then you just have
> > > to hold the lock across the update of the BD ptr, just like everywhere else.
> >
> > That will work, but wont the zero show up on the console? hmm, since
> > the zero count will be very unlikely case anyhow,  I can live with that.
>
> OK, this patch does the above. I left my test function(err_copy_from_user)
> to simulate bad copy_from_user() copies every now and then. Just remove
> it and change the call in rs_8xx_write when you have tested it.
> Works great for me, not even jove(emacs like editor) will break it.

KGDB still works for me.  Dan, happy with this?

--
Tom Rini
http://gate.crashing.org/~trini/

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