Re: [PATCH 1/2] serial: 8250: add UPF_NO_EMPTY_FIFO_READ flag

[Tony Lindgren <tony@atomide.com>]

* Pandita, Vikram <vikram.pandita@ti.com> [091117 09:39]:
> Tony
> 
> >From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-owner@vger.kernel.org] On Behalf Of Tony
> >Lindgren
> >Sent: Tuesday, November 17, 2009 11:06 AM
> >To: Pandita, Vikram
> >Cc: linux-omap@vger.kernel.org; Shilimkar, Santosh
> >Subject: Re: [PATCH 1/2] serial: 8250: add UPF_NO_EMPTY_FIFO_READ flag
> >
> >* Vikram Pandita <vikram.pandita@ti.com> [091116 15:00]:
> >> OMAP3630 and OMAP4430 UART IP blocks have a restriction wrt RX FIFO.
> >> Empty RX fifo read causes an abort. OMAP1/2/3 do not have this restriction.
> >>
> >> So interoduce a flag in 8250 driver: UPF_NO_EMPTY_FIFO_READ
> >>
> >> If this flag is specified for an 8250 port, then first check if rx fifo has
> >> contents, and only then proceed to read the fifo.
> >>
> >> The change affects only boards passing this flag in port data and hence is
> >> non-disruptive for other boards.
> >>
> >> First reported/fixed on omap4430 by Shilimkar, Santosh
> >
> >This should go to linux-serial@vger.kernel.org and Alan Cox.
> 
> Patches were posted to l-o for review. Next step was to get it to the right subsystem.
> 
> I thought Alan Cox stepped down from the maintainership of serial/tty subsystem.
> Not sure if Andrew Morton is taking these patches to MM tree for now.
> Any idea?

OK, no idea who's dealing with 8250 now :)

Tony