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Subject[PATCH 01/24] mtd/maps/pismo: remove dangling pointer and a leak
While looking for drivers which forgot to clear i2c_clientdata before freeing
the data structure it points to, I found that the pismo driver even has a leak
on the probe error path.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: David Woodhouse <David.Woodhouse@intel.com>
---
drivers/mtd/maps/pismo.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/maps/pismo.c b/drivers/mtd/maps/pismo.c
index 30e12c8..86081bc 100644
--- a/drivers/mtd/maps/pismo.c
+++ b/drivers/mtd/maps/pismo.c
@@ -233,6 +233,7 @@ static int __devexit pismo_remove(struct i2c_client *client)
/* FIXME: set_vpp needs saner arguments */
pismo_setvpp_remove_fix(pismo);

+ i2c_set_clientdata(client, NULL);
kfree(pismo);

return 0;
@@ -271,7 +272,7 @@ static int __devinit pismo_probe(struct i2c_client *client,
ret = pismo_eeprom_read(client, &eeprom, 0, sizeof(eeprom));
if (ret < 0) {
dev_err(&client->dev, "error reading EEPROM: %d\n", ret);
- return ret;
+ goto exit_free;
}

dev_info(&client->dev, "%.15s board found\n", eeprom.board);
@@ -282,6 +283,11 @@ static int __devinit pismo_probe(struct i2c_client *client,
pdata->cs_addrs[i]);

return 0;
+
+ exit_free:
+ i2c_set_clientdata(client, NULL);
+ kfree(prismo);
+ return ret;
}

static const struct i2c_device_id pismo_id[] = {
--
1.7.0


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