From 35bb4b22f606c0cc8eedf567313adc18161b1af4 Mon Sep 17 00:00:00 2001
From: Douglas Anderson <dianders@chromium.org>
Date: Fri, 17 Apr 2020 14:15:47 -0700
Subject: [PATCH] soc: qcom: rpmh: Dirt can only make you dirtier, not cleaner
Git-commit: 35bb4b22f606c0cc8eedf567313adc18161b1af4
Patch-mainline: v5.8-rc1
References: git-fixes

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>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/soc/qcom/rpmh.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c
index 3abbb08cd6e1..d1626a1328d7 100644
--- a/drivers/soc/qcom/rpmh.c
+++ b/drivers/soc/qcom/rpmh.c
@@ -151,10 +151,10 @@ static struct cache_req *cache_rpm_request(struct rpmh_ctrlr *ctrlr,
 		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);
-- 
2.16.4