Re: [PATCH -rt] buggy UART fix

[Ingo Molnar <mingo@elte.hu>]

* Steven Rostedt <rostedt@goodmis.org> wrote:

> Ingo,
> 
> I'm not sure if this is the correct fix, but it fixes a problem on one 
> of our boards.  The uart does't set the IIR register upon receiving an 
> interrupt for transmit.  Thus we get processes stuck waiting to send 
> data out.
> 
> This doesn't seem to be a problem on vanilla, and I'm not sure why. 
> Perhaps the scheduling doesn't ever let the transmit buffer get full? 
> Well I haven't look too much into the vanilla side.
> 
> This patch forces the processing of the interrupt even if the iir 
> doesn't show that there was an interrupt, iff the uart has been 
> detected as buggy (which our board's uart is ) and the interrupt 
> hasn't already handled it.

thx, applied.

	Ingo