i2c: tegra: Fix suspending in active runtime PM state
authorDmitry Osipenko <digetx@gmail.com>
Tue, 14 Jan 2020 01:34:35 +0000 (04:34 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 23 Jan 2020 07:22:46 +0000 (08:22 +0100)
commit836162fa1368cb979a3522f8f91dc4e98d289bda
tree02e4a1f39dabc22e9c02ad3e96cc0a805080648b
parent6c95e4fb88714895283df9165b0d718794d50b41
i2c: tegra: Fix suspending in active runtime PM state

commit 9f42de8d4ec2304f10bbc51dc0484f3503d61196 upstream.

I noticed that sometime I2C clock is kept enabled during suspend-resume.
This happens because runtime PM defers dynamic suspension and thus it may
happen that runtime PM is in active state when system enters into suspend.
In particular I2C controller that is used for CPU's DVFS is often kept ON
during suspend because CPU's voltage scaling happens quite often.

Fixes: 8ebf15e9c869 ("i2c: tegra: Move suspend handling to NOIRQ phase")
Cc: <stable@vger.kernel.org> # v5.4+
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/i2c/busses/i2c-tegra.c