[PATCH] scx200_acb: Fix resource name use after free

We can't pass a string on the stack to request_region. As soon as we
leave the function that stack is gone and the string is lost. Let's
use the same string we identify the i2c_adapter with instead, it's
more simple, more consistent, and just works.

This is the second half of fix to bug #6445.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/i2c/busses/scx200_acb.c

@@ -440,7 +440,6 @@ static int  __init scx200_acb_create(int base, int index)
 	struct scx200_acb_iface *iface;
 	struct i2c_adapter *adapter;
 	int rc = 0;
-	char description[64];
 
 	iface = kzalloc(sizeof(*iface), GFP_KERNEL);
 	if (!iface) {
@@ -459,8 +458,7 @@ static int  __init scx200_acb_create(int base, int index)
 
 	init_MUTEX(&iface->sem);
 
-	snprintf(description, sizeof(description), "NatSemi SCx200 ACCESS.bus [%s]", adapter->name);
-	if (request_region(base, 8, description) == 0) {
+	if (!request_region(base, 8, adapter->name)) {
 		dev_err(&adapter->dev, "can't allocate io 0x%x-0x%x\n",
 			base, base + 8-1);
 		rc = -EBUSY;