linux-kernel - Re: [PATCH] spi/spi-fsl-spi: reference correct pdata in fsl_spi_cs

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Date:	Sun, 13 May 2012 11:22:25 +0200
From:	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
To:	"Herton R. Krzesinski" <herton.krzesinski@...onical.com>
Cc:	Ben Hutchings <ben@...adent.org.uk>,
	Grant Likely <grant.likely@...retlab.ca>,
	Kenth Eriksson <kenth.eriksson@...nsmode.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	linux-kernel@...r.kernel.org,
	spi-devel-general@...ts.sourceforge.net
Subject: Re: [PATCH] spi/spi-fsl-spi: reference correct pdata in fsl_spi_cs_control

"Herton R. Krzesinski" <herton.krzesinski@...onical.com> wrote on 2012/05/12 00:29:50:
>
> From: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
>
> Commit 178db7d3, "spi: Fix device unregistration when unregistering
> the bus master", changed spi device initialization of dev.parent pointer
> to be the master's device pointer instead of his parent.
>
> This introduced a bug in spi-fsl-spi, since its usage of spi device
> pointer was not updated accordingly. This was later fixed by commit
> 5039a86, "spi/mpc83xx: fix NULL pdata dereference bug", but it missed
> another spot on fsl_spi_cs_control function where we also need to update
> usage of spi device pointer. This change address that.
>
> Cc: stable@...r.kernel.org
> Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
> ---
>  drivers/spi/spi-fsl-spi.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
> index 5f748c0..6a62934 100644
> --- a/drivers/spi/spi-fsl-spi.c
> +++ b/drivers/spi/spi-fsl-spi.c
> @@ -933,7 +933,7 @@ err:
>
>  static void fsl_spi_cs_control(struct spi_device *spi, bool on)
>  {
> -   struct device *dev = spi->dev.parent;
> +   struct device *dev = spi->dev.parent->parent;
>     struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(dev->platform_data);
>     u16 cs = spi->chip_select;
>     int gpio = pinfo->gpios[cs];

So it seems
Acked-by: Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>

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