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From: Wolfram Sang on 20 Mar 2010 10:20
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(a)pengutronix.de>
Cc: Greg Kroah-Hartman <gregkh(a)suse.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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Prev: [PATCH 21/24] staging/iio/adc: fix dangling pointers
Next: [PATCH v1 0/10] Uprobes patches.