2017-09-28 09:52:25

by Martyn Welch

Subject: [PATCH] Use RX_BUF_SIZE to set size of RX buffer

The imx serial driver uses PAGE_SIZE when allocating rx_buf, but then
uses RX_BUF_SIZE (which is currently defined as PAGE_SIZE) to describe
the length of the buffer when initialising the scatter gather list.

In order to ensure that this stays consistent, use RX_BUF_SIZE in both
locations.
---
drivers/tty/serial/imx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index fe368a4..bc2f2a2f 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1165,7 +1165,7 @@ static int imx_uart_dma_init(struct imx_port *sport)
goto err;
}

- sport->rx_buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ sport->rx_buf = kzalloc(RX_BUF_SIZE, GFP_KERNEL);
if (!sport->rx_buf) {
ret = -ENOMEM;
goto err;
--
1.8.3.1

2017-09-28 10:00:28

by Uwe Kleine-König

Subject: Re: [PATCH] Use RX_BUF_SIZE to set size of RX buffer

On Thu, Sep 28, 2017 at 10:52:15AM +0100, Martyn Welch wrote:
> The imx serial driver uses PAGE_SIZE when allocating rx_buf, but then
> uses RX_BUF_SIZE (which is currently defined as PAGE_SIZE) to describe
> the length of the buffer when initialising the scatter gather list.
>
> In order to ensure that this stays consistent, use RX_BUF_SIZE in both
> locations.

Missing SoB Line

> ---
> drivers/tty/serial/imx.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
> index fe368a4..bc2f2a2f 100644
> --- a/drivers/tty/serial/imx.c
> +++ b/drivers/tty/serial/imx.c
> @@ -1165,7 +1165,7 @@ static int imx_uart_dma_init(struct imx_port *sport)
> goto err;
> }
>
> - sport->rx_buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
> + sport->rx_buf = kzalloc(RX_BUF_SIZE, GFP_KERNEL);
> if (!sport->rx_buf) {
> ret = -ENOMEM;
> goto err;
Acked-by: Uwe Kleine-K?nig <[email protected]>


--
Pengutronix e.K. | Uwe Kleine-K?nig |
Industrial Linux Solutions | http://www.pengutronix.de/ |

2017-09-28 10:04:57

by Martyn Welch

Subject: Re: [PATCH] Use RX_BUF_SIZE to set size of RX buffer

On Thu, Sep 28, 2017 at 12:00:19PM +0200, Uwe Kleine-K?nig wrote:
> On Thu, Sep 28, 2017 at 10:52:15AM +0100, Martyn Welch wrote:
> > The imx serial driver uses PAGE_SIZE when allocating rx_buf, but then
> > uses RX_BUF_SIZE (which is currently defined as PAGE_SIZE) to describe
> > the length of the buffer when initialising the scatter gather list.
> >
> > In order to ensure that this stays consistent, use RX_BUF_SIZE in both
> > locations.
>
> Missing SoB Line

Doh! v2 on way...

>
> > ---
> > drivers/tty/serial/imx.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
> > index fe368a4..bc2f2a2f 100644
> > --- a/drivers/tty/serial/imx.c
> > +++ b/drivers/tty/serial/imx.c
> > @@ -1165,7 +1165,7 @@ static int imx_uart_dma_init(struct imx_port *sport)
> > goto err;
> > }
> >
> > - sport->rx_buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
> > + sport->rx_buf = kzalloc(RX_BUF_SIZE, GFP_KERNEL);
> > if (!sport->rx_buf) {
> > ret = -ENOMEM;
> > goto err;
> Acked-by: Uwe Kleine-K?nig <[email protected]>
>
>
> --
> Pengutronix e.K. | Uwe Kleine-K?nig |
> Industrial Linux Solutions | http://www.pengutronix.de/ |