linux-kernel - [PATCH 19/24] staging/dream: fix dangling pointers

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Message-Id: <1269094385-16114-20-git-send-email-w.sang@pengutronix.de>
Date:	Sat, 20 Mar 2010 15:13:00 +0100
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	kernel-janitors@...r.kernel.org
Cc:	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	Wolfram Sang <w.sang@...gutronix.de>,
	Greg Kroah-Hartman <gregkh@...e.de>, devel@...verdev.osuosl.org
Subject: [PATCH 19/24] staging/dream: fix dangling pointers

Fix I2C-drivers which missed setting clientdata to NULL before freeing the
structure it points to. Also fix drivers which do this _after_ the structure
was freed already.

Signed-off-by: Wolfram Sang <w.sang@...gutronix.de>
Cc: Greg Kroah-Hartman <gregkh@...e.de>
---

Found using coccinelle, then reviewed. Full patchset is available via
kernel-janitors, linux-i2c, and LKML.
---
 drivers/staging/dream/synaptics_i2c_rmi.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/dream/synaptics_i2c_rmi.c b/drivers/staging/dream/synaptics_i2c_rmi.c
index 4de6bc9..a318c18 100644
--- a/drivers/staging/dream/synaptics_i2c_rmi.c
+++ b/drivers/staging/dream/synaptics_i2c_rmi.c
@@ -534,6 +534,7 @@ err_input_register_device_failed:
 err_input_dev_alloc_failed:
 err_detect_failed:
 err_power_failed:
+	i2c_set_clientdata(client, NULL);
 	kfree(ts);
 err_alloc_data_failed:
 err_check_functionality_failed:
@@ -551,6 +552,7 @@ static int synaptics_ts_remove(struct i2c_client *client)
 	else
 		hrtimer_cancel(&ts->timer);
 	input_unregister_device(ts->input_dev);
+	i2c_set_clientdata(client, NULL);
 	kfree(ts);
 	return 0;
 }
-- 
1.7.0

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