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soc: qcom: rpmh: Dirt can only make you dirtier, not cleaner

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commit 35bb4b22f606c0cc8eedf567313adc18161b1af4 upstream.

Adding an item into the cache should never be able to make the cache
cleaner.  Use "|=" rather than "=" to update the dirty flag.

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Maulik Shah <mkshah@codeaurora.org> Thanks, Maulik
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: bb7000677a1b ("soc: qcom: rpmh: Update dirty flag only when data changes")
Reported-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20200417141531.1.Ia4b74158497213eabad7c3d474c50bfccb3f342e@changeid
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Douglas Anderson 2020-04-17 14:15:47 -07:00 • committed by Greg Kroah-Hartman
commit 4f80cb2c78
1 changed files with 4 additions and 4 deletions
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8
drivers/soc/qcom/rpmh.c
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@ -150,10 +150,10 @@ existing:
break;
}
ctrlr->dirty = (req->sleep_val != old_sleep_val ||
req->wake_val != old_wake_val) &&
req->sleep_val != UINT_MAX &&
req->wake_val != UINT_MAX;
ctrlr->dirty |= (req->sleep_val != old_sleep_val ||
req->wake_val != old_wake_val) &&
req->sleep_val != UINT_MAX &&
req->wake_val != UINT_MAX;
unlock:
spin_unlock_irqrestore(&ctrlr->cache_lock, flags);