[PATCH] i2c: do not use device name after device_unregister

[Thadeu Lima de Souza Cascardo]

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

[ 7860.470713] i2c Xy2ï0: adapter [SMBus I801 adapter at 1880] unregistered

The right output would be:
[   60.639233] i2c i2c-0: adapter [SMBus I801 adapter at 1880] unregistered

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxxx>
---
 drivers/i2c/i2c-core.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 0ac2f90..d5db0f4 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -843,6 +843,9 @@ int i2c_del_adapter(struct i2c_adapter *adap)
 				 adap->dev.parent);
 #endif
 
+	/* 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);
@@ -855,8 +858,6 @@ int i2c_del_adapter(struct i2c_adapter *adap)
 	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));
-- 
1.6.5.7

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