input: rohm_bu21023: switch to i2c_lock_bus(..., I2C_LOCK_SEGMENT)
authorPeter Rosin <peda@axentia.se>
Wed, 20 Jun 2018 05:17:56 +0000 (07:17 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 26 Sep 2018 06:38:12 +0000 (08:38 +0200)
commitbb9dcbf97a9be5a144f65c36e3fdd460307e52f4
treea9115d44cae2e1489b28e89d484e024d0d5e0167
parent80784cba90f3e976ac44a18d9dce45d6c706a624
input: rohm_bu21023: switch to i2c_lock_bus(..., I2C_LOCK_SEGMENT)

[ Upstream commit 193c2a07cfaacb9249ab0e3d34bce32490879355 ]

Locking the root adapter for __i2c_transfer will deadlock if the
device sits behind a mux-locked I2C mux. Switch to the finer-grained
i2c_lock_bus with the I2C_LOCK_SEGMENT flag. If the device does not
sit behind a mux-locked mux, the two locking variants are equivalent.

Signed-off-by: Peter Rosin <peda@axentia.se>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/input/touchscreen/rohm_bu21023.c