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| author |   Dmitry Osipenko <digetx@gmail.com> | 2019-05-02 02:38:02 +0300 |
|---|---|---|
| committer |   MyungJoo Ham <myungjoo.ham@samsung.com> | 2019-08-24 20:11:12 +0900 |
| commit | ed2a8dd22a752af60282af38a47d26b227f772a7 (patch) | |
| tree | 8c01f28d3b64fd47546ed883684e688bca8ae391 /drivers/devfreq | |
| parent | PM / devfreq: tegra: Replace readl-writel with relaxed versions (diff) | |
| download | linux-dev-ed2a8dd22a752af60282af38a47d26b227f772a7.tar.xz linux-dev-ed2a8dd22a752af60282af38a47d26b227f772a7.zip | |
PM / devfreq: tegra: Replace write memory barrier with the read barrier
The write memory barrier isn't needed because the BUS buffer is flushed
by read after write that happens after the removed wmb(), we will also
use readl() instead of the relaxed version to ensure that read is indeed
completed.
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Diffstat (limited to 'drivers/devfreq')
| -rw-r--r-- | drivers/devfreq/tegra-devfreq.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/devfreq/tegra-devfreq.c b/drivers/devfreq/tegra-devfreq.c index 9d9bfef1465d..986f3dfbcab9 100644 --- a/drivers/devfreq/tegra-devfreq.c +++ b/drivers/devfreq/tegra-devfreq.c @@ -231,8 +231,7 @@ static void tegra_devfreq_update_wmark(struct tegra_devfreq *tegra, static void actmon_write_barrier(struct tegra_devfreq *tegra) { /* ensure the update has reached the ACTMON */ - wmb(); - actmon_readl(tegra, ACTMON_GLB_STATUS); + readl(tegra->regs + ACTMON_GLB_STATUS); } static void actmon_isr_device(struct tegra_devfreq *tegra, |