linux-kernel - Re: [PATCH 3/3] ARM: sunxi: spi: use proper errno when message is too long.

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Date:	Sun, 26 Apr 2015 10:42:21 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Michal Suchanek <hramrach@...il.com>
Cc:	linux-sunxi@...glegroups.com, Mark Brown <broonie@...nel.org>,
	linux-spi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] ARM: sunxi: spi: use proper errno when message is
 too long.

On Sat, Apr 25, 2015 at 09:21:07PM +0200, Michal Suchanek wrote:
> Signed-off-by: Michal Suchanek <hramrach@...il.com>

No commit log?

> ---
>  drivers/spi/spi-sun4i.c | 2 +-
>  drivers/spi/spi-sun6i.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/spi/spi-sun4i.c b/drivers/spi/spi-sun4i.c
> index fbb0a4d..8238b4e 100644
> --- a/drivers/spi/spi-sun4i.c
> +++ b/drivers/spi/spi-sun4i.c
> @@ -176,7 +176,7 @@ static int sun4i_spi_transfer_one(struct spi_master *master,
>  
>  	/* We don't support transfer larger than the FIFO */
>  	if (tfr->len > SUN4I_FIFO_DEPTH)
> -		return -EINVAL;
> +		return -EMSGSIZE;

Is it still a thing? The patch to remove such limit hasn't been merged
yet?

>  	reinit_completion(&sspi->done);
>  	sspi->tx_buf = tfr->tx_buf;
> diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c
> index ac48f59..0f5dd91 100644
> --- a/drivers/spi/spi-sun6i.c
> +++ b/drivers/spi/spi-sun6i.c
> @@ -166,7 +166,7 @@ static int sun6i_spi_transfer_one(struct spi_master *master,
>  
>  	/* We don't support transfer larger than the FIFO */
>  	if (tfr->len > SUN6I_FIFO_DEPTH)
> -		return -EINVAL;
> +		return -EMSGSIZE;

Eventually, we should move to using DMA for these messages longer than
the FIFO.

I should post these patches.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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