linux-kernel - [PATCH 3/3] soc: qcom: rpmh: Invalidate sleep and wake TCS before flushing new data

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Date:   Tue,  4 Feb 2020 11:43:51 +0530
From:   Maulik Shah <mkshah@...eaurora.org>
To:     bjorn.andersson@...aro.org, agross@...nel.org
Cc:     linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        swboyd@...omium.org, evgreen@...omium.org, dianders@...omium.org,
        rnayak@...eaurora.org, ilina@...eaurora.org, lsrao@...eaurora.org,
        Maulik Shah <mkshah@...eaurora.org>
Subject: [PATCH 3/3] soc: qcom: rpmh: Invalidate sleep and wake TCS before flushing new data

TCSes have previously programmed data when rpmh_flush is called.
This can cause old data to trigger along with newly flushed.

Fix this by cleaning sleep and wake TCSes before new data is flushed.

Signed-off-by: Maulik Shah <mkshah@...eaurora.org>
---
 drivers/soc/qcom/rpmh.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c
index 04c7805..5ae1b91 100644
--- a/drivers/soc/qcom/rpmh.c
+++ b/drivers/soc/qcom/rpmh.c
@@ -475,6 +475,10 @@ int rpmh_flush(const struct device *dev)
 		return 0;
 	}
 
+	do {
+		ret = rpmh_rsc_invalidate(ctrlr_to_drv(ctrlr));
+	} while (ret == -EAGAIN);
+
 	/* First flush the cached batch requests */
 	ret = flush_batch(ctrlr);
 	if (ret)
-- 
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