linux-kernel - Re: [PATCH 2/3] serial: uart_poll

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Message-ID: <ZBMEjp16fBNE33o4@kroah.com>
Date:   Thu, 16 Mar 2023 12:59:10 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     Bjorn Andersson <andersson@...nel.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        linux-serial@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        kgdb-bugreport@...ts.sourceforge.net,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] serial: uart_poll_init() should power on the UART

On Mon, Mar 13, 2023 at 01:53:02PM -0700, Doug Anderson wrote:
> Hi,
> 
> On Tue, Mar 7, 2023 at 7:32 AM Douglas Anderson <dianders@...omium.org> wrote:
> >
> > On Qualcomm devices which use the "geni" serial driver, kdb/kgdb won't
> > be very happy if you use it but the resources of the port haven't been
> > powered on. Today kdb/kgdb rely on someone else powering the port
> > on. This could be the normal kernel console or an agetty running.
> > Let's fix this to explicitly power things on when setting up a polling
> > driver.
> >
> > Signed-off-by: Douglas Anderson <dianders@...omium.org>
> > ---
> >
> >  drivers/tty/serial/serial_core.c | 6 ++++++
> >  1 file changed, 6 insertions(+)
> 
> Just in case it's not obvious, even though we ended up going with
> Johan's series [1] instead of patch #1 of my series, patch #2 and #3
> of my series are still relevant. I can repost the series without patch
> #1 if it's helpful.
> 
> [1] https://lore.kernel.org/r/20230307164405.14218-1-johan+linaro@kernel.org

Ye,s it's not obvious at all.  Please resubmit.

thanks,

greg k-h