From 6ea23039cb1cc7c379eb5fba0ed2c53291e9bea7 Mon Sep 17 00:00:00 2001 From: Jiri Kosina Date: Sun, 10 Dec 2006 21:21:30 +0100 Subject: i2c: Add support for nested i2c bus locking This patch adds the 'level' field into the i2c_adapter structure, which is used to represent the 'logical' level of nesting for the purposes of lockdep. This field is then used in the i2c_transfer() function, to acquire the per-adapter bus_lock with correct nesting level. Signed-off-by: Jiri Kosina Signed-off-by: Jean Delvare --- include/linux/i2c.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 9b5d047..08df416 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -216,6 +216,7 @@ struct i2c_adapter { int (*client_unregister)(struct i2c_client *); /* data fields that are valid for all devices */ + u8 level; /* nesting level for lockdep */ struct mutex bus_lock; struct mutex clist_lock; -- cgit v1.1