]> www.infradead.org Git - users/dwmw2/linux.git/commit
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 06:39:41 +0000 (08:39 +0200)
commitb1373b80f9ec6a387c1818052e139e52f0f868e0
treec36c9b45f1ee4afe39eb297a708861d828f05053
parentae8247766d568036fb6843a9934d5462ccab23ea
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