tree 2058f58e44b3ecd72aac347e308fbcffbbd77625
parent 72cf8c565cf4e25312fb9fa65d306ae736104ade
author Bartosz Golaszewski <bgolaszewski@baylibre.com> 1474041762 +0200
committer Wolfram Sang <wsa@the-dreams.de> 1474706898 +0200

i2c: export i2c_adapter_depth()

For crazy setups in which an i2c gpio expander is behind an i2c gpio
multiplexer controlled by a gpio provided a second expander using the
same device driver we need to explicitly tell lockdep how to handle
nested locking.

Export i2c_adapter_depth() as public API to be reused outside of i2c
core code.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Peter Rosin <peda@axentia.se>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>