linux-kernel - [50/89] i2c: Do not use device name after device

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Message-Id: <20100330225839.138786873@linux.site>
Date:	Tue, 30 Mar 2010 15:57:52 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Jean Delvare <jdelvare@...e.de>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [50/89] i2c: Do not use device name after device_unregister

2.6.31-stable review patch.  If anyone has any objections, please let us know.

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

commit c556752109794a5ff199b80a1673336b4df8433a upstream.

dev_dbg outputs dev_name, which is released with device_unregister. This bug
resulted in output like this:

i2c Xy2�0: adapter [SMBus I801 adapter at 1880] unregistered

The right output would be:
i2c i2c-0: adapter [SMBus I801 adapter at 1880] unregistered

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>
Signed-off-by: Jean Delvare <khali@...ux-fr.org>
Acked-by: Jean Delvare <jdelvare@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 drivers/i2c/i2c-core.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -752,6 +752,9 @@ int i2c_del_adapter(struct i2c_adapter *
 	   checking the returned value. */
 	res = device_for_each_child(&adap->dev, NULL, __unregister_client);
 
+	/* device name is gone after device_unregister */
+	dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name);
+
 	/* clean up the sysfs representation */
 	init_completion(&adap->dev_released);
 	device_unregister(&adap->dev);
@@ -764,8 +767,6 @@ int i2c_del_adapter(struct i2c_adapter *
 	idr_remove(&i2c_adapter_idr, adap->nr);
 	mutex_unlock(&core_lock);
 
-	dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name);
-
 	/* Clear the device structure in case this adapter is ever going to be
 	   added again */
 	memset(&adap->dev, 0, sizeof(adap->dev));


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