Re: serial: 8250 fails to detect Exar XR16L2551 correctly

[Alex Williamson]

On Mon, 2005-07-11 at 21:17 +0100, Russell King wrote:
> On Mon, Jul 11, 2005 at 02:00:57PM -0600, Alex Williamson wrote:
> > On Mon, 2005-07-11 at 20:46 +0100, Russell King wrote:
> > > There was a bug in this area - does it happen with latest and greatest
> > > kernels?
> > 
> >    Yes, I'm using a git pull from ~5hrs ago.  How recent was the bug
> > fix?  It worked fine before I applied David's patch, the A2 UART was
> > detected as a 16550A.  Thanks,
> 
> The fix for this went in on 21st May 2005, so obviously it's not
> actually fixed.

   No, I think this is a problem with the broken A2 UARTs getting
confused in serial8250_set_sleep().  If I remove either UART_CAP_SLEEP
or UART_CAP_EFR from the capabilities list for this UART, it behaves
normally.  Also, just commenting out the UART_CAP_EFR chunks of
set_sleep make it behave.  I'll ping Exar for more data.  Thanks,

	Alex

-- 
Alex Williamson                             HP Linux & Open Source Lab

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