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

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Date:   Tue, 30 Jul 2019 17:51:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Andrey Smirnov <andrew.smirnov@...il.com>
Cc:     linux-serial@...r.kernel.org, Stefan Agner <stefan@...er.ch>,
        Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>,
        Chris Healy <cphealy@...il.com>,
        Cory Tusar <cory.tusar@....aero>,
        Lucas Stach <l.stach@...gutronix.de>,
        Jiri Slaby <jslaby@...e.com>, linux-imx@....com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/24] tty: serial: fsl_lpuart: Drop unnecessary
 sg_set_buf() call

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?

thanks,

greg k-h