releases/5.7.16/soc-qcom-pdr-reorder-the-pd-state-indication-ack.patch

From f1544bc469bb03ca13a837971c97514eceaee565 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Thu, 2 Jul 2020 01:29:54 +0530
Subject: soc: qcom: pdr: Reorder the PD state indication ack

From: Sibi Sankar <sibis@codeaurora.org>

[ Upstream commit 72fe996f9643043c8f84e32c0610975b01aa555b ]

The Protection Domains (PD) have a mechanism to keep its resources
enabled until the PD down indication is acked. Reorder the PD state
indication ack so that clients get to release the relevant resources
before the PD goes down.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
Fixes: fbe639b44a82 ("soc: qcom: Introduce Protection Domain Restart helpers")
Reported-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Link: https://lore.kernel.org/r/20200701195954.9007-1-sibis@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/soc/qcom/pdr_interface.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/pdr_interface.c b/drivers/soc/qcom/pdr_interface.c
index 17ad3b8698e16..cd8828c857234 100644
--- a/drivers/soc/qcom/pdr_interface.c
+++ b/drivers/soc/qcom/pdr_interface.c
@@ -282,13 +282,15 @@ static void pdr_indack_work(struct work_struct *work)
 
 	list_for_each_entry_safe(ind, tmp, &pdr->indack_list, node) {
 		pds = ind->pds;
-		pdr_send_indack_msg(pdr, pds, ind->transaction_id);
 
 		mutex_lock(&pdr->status_lock);
 		pds->state = ind->curr_state;
 		pdr->status(pds->state, pds->service_path, pdr->priv);
 		mutex_unlock(&pdr->status_lock);
 
+		/* Ack the indication after clients release the PD resources */
+		pdr_send_indack_msg(pdr, pds, ind->transaction_id);
+
 		mutex_lock(&pdr->list_lock);
 		list_del(&ind->node);
 		mutex_unlock(&pdr->list_lock);
-- 
2.25.1