linux-kernel - [ 096/117] spi/spi-fsl-spi: reference correct pdata in fsl_spi_cs

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Message-Id: <20120528031216.101299517@decadent.org.uk>
Date:	Mon, 28 May 2012 04:13:38 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>,
	Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: [ 096/117] spi/spi-fsl-spi: reference correct pdata in fsl_spi_cs_control

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>

commit 067aa4815a9bc12a569d8a06afef50ba5773afbf upstream.

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.

Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
Acked-by: Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>
Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 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];


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