linux-kernel - Re: [PATCH 06/24] tty: serial: fsl_lpuart: Drop unnecessary sg_set

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Date:   Tue, 30 Jul 2019 19:08:34 -0700
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-serial@...r.kernel.org, Stefan Agner <stefan@...er.ch>,
        Chris Healy <cphealy@...il.com>,
        Cory Tusar <cory.tusar@....aero>,
        Lucas Stach <l.stach@...gutronix.de>,
        Jiri Slaby <jslaby@...e.com>, dl-linux-imx <linux-imx@....com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/24] tty: serial: fsl_lpuart: Drop unnecessary
 sg_set_buf() call

On Tue, Jul 30, 2019 at 8:51 AM Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> On Mon, Jul 29, 2019 at 12:52:08PM -0700, Andrey Smirnov wrote:
> > Sg_init_one() will already call sg_set_buf(), so another explicit call
> > right after it is unnecessary. Drop it.
> >
> > Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
> > Cc: Stefan Agner <stefan@...er.ch>
> > Cc: Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>
> > Cc: Chris Healy <cphealy@...il.com>
> > Cc: Cory Tusar <cory.tusar@....aero>
> > Cc: Lucas Stach <l.stach@...gutronix.de>
> > Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > Cc: Jiri Slaby <jslaby@...e.com>
> > Cc: linux-imx@....com
> > Cc: linux-serial@...r.kernel.org
> > Cc: linux-kernel@...r.kernel.org
> > ---
> >  drivers/tty/serial/fsl_lpuart.c | 1 -
> >  1 file changed, 1 deletion(-)
> >
> > diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
> > index 1b3f2a87e558..b600f591c8c2 100644
> > --- a/drivers/tty/serial/fsl_lpuart.c
> > +++ b/drivers/tty/serial/fsl_lpuart.c
> > @@ -1144,7 +1144,6 @@ static inline int lpuart_start_rx_dma(struct lpuart_port *sport)
> >               return -ENOMEM;
> >
> >       sg_init_one(&sport->rx_sgl, ring->buf, sport->rx_dma_rng_buf_len);
> > -     sg_set_buf(&sport->rx_sgl, ring->buf, sport->rx_dma_rng_buf_len);
> >       nent = dma_map_sg(sport->port.dev, &sport->rx_sgl, 1, DMA_FROM_DEVICE);
> >
> >       if (!nent) {
>
> This patch doesn't apply, is it already in the tree from someone else?
>

Yeah, looks like d9aa9ab4fe6b5c43b9ccb8a0811dadcfe40ea27f from your
tty tree already covered this and I didn't have it in my tree. Will
drop in v2.

Thanks,
Andrey Smirnov