linux-kernel - Re: [PATCHv2 2/3] tty/serial: at91: fix hardware handshake with GPIOs

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Date:   Thu, 22 Sep 2016 11:47:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Richard Genoud <richard.genoud@...il.com>
Cc:     Cyrille Pitchen <cyrille.pitchen@...el.com>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Nicolas Ferre <nicolas.ferre@...el.com>,
        linux-arm-kernel@...ts.infradead.org, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2 2/3] tty/serial: at91: fix hardware handshake with GPIOs

On Mon, Sep 12, 2016 at 11:47:32AM +0200, Richard Genoud wrote:
> Commit 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when
> hardware handshake is enabled") broke the hardware handshake when GPIOs
> where used.
> 
> Hardware handshake with GPIOs used to work before this commit because
> the CRTSCTS flag (termios->c_cflag) was set, but not the
> ATMEL_US_USMODE_HWHS flag (controller register) ; so hardware handshake
> enabled, but not handled by the controller.
> 
> This commit restores this behaviour.
> 
> NB: -stable is not Cced because it doesn't cleanly apply on 4.1+
> and it will also need previous commit:
> "serial: mctrl_gpio: implement mctrl_gpio_use_rtscts"
> 
> Signed-off-by: Richard Genoud <richard.genoud@...il.com>
> Acked-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
> Fixes: 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when hardware handshake is enabled")
> ---
>  drivers/tty/serial/atmel_serial.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)

This patch doesn't apply to my tree, are you sure it's up to date?

Can you please refresh this whole series against linux-next and resend?

thanks,

greg k-h