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authorJean Delvare <khali@linux-fr.org>2010-08-11 12:21:01 -0400
committerJean Delvare <khali@linux-fr.org>2010-08-11 12:21:01 -0400
commitdafc50d141c27959dbd3a1cfe9857a86d23402a7 (patch)
tree565aea94308f40813540f06d7bbcb322ae92eeed /include/linux/i2c.h
parent8031d79baedabd44590d047d97a310eb0e0e4e0c (diff)
i2c: Use a separate mutex for userspace client lists
Moving userspace-instantiated clients to separate lists wasn't nearly enough to avoid deadlocks in multiplexed bus cases. We also want to have a dedicated mutex to protect each list. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Michael Lawnick <ml.lawnick@gmx.de>
Diffstat (limited to 'include/linux/i2c.h')
-rw-r--r--include/linux/i2c.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 5bf0f4beea31..798bad8741e4 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -368,6 +368,7 @@ struct i2c_adapter {
368 char name[48]; 368 char name[48];
369 struct completion dev_released; 369 struct completion dev_released;
370 370
371 struct mutex userspace_clients_lock;
371 struct list_head userspace_clients; 372 struct list_head userspace_clients;
372}; 373};
373#define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev) 374#define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)