linux-kernel - [PATCH v8 3/3] firmware: qcom_scm: Check for waitq state in wait_for_wq

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Message-Id: <20251102-multi_waitq_scm-v8-3-d71ee7b93b62@oss.qualcomm.com>
Date: Sun, 02 Nov 2025 13:48:47 +0530
From: Shivendra Pratap <shivendra.pratap@....qualcomm.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Unnathi Chalicheemala <unnathi.chalicheemala@....qualcomm.com>,
        Shivendra Pratap <shivendra.pratap@....qualcomm.com>
Subject: [PATCH v8 3/3] firmware: qcom_scm: Check for waitq state in
 wait_for_wq_completion()

From: Unnathi Chalicheemala <unnathi.chalicheemala@....qualcomm.com>

Modify wait_for_wq_completion() to check if task is in idle state using
wait_for_completion_state().

This allows for detecting when waitq contexts are in idle state and
propagates it to __scm_smc_do(), which is beneficial when task is idle
and waiting for a kick to accept new requests.

Signed-off-by: Unnathi Chalicheemala <unnathi.chalicheemala@....qualcomm.com>
Signed-off-by: Shivendra Pratap <shivendra.pratap@....qualcomm.com>
---
 drivers/firmware/qcom/qcom_scm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c
index 0b6efa7c2bdc25a3ba152c25d5451d1154779ddd..38c1c8aff9fa3a90eca9dba700611dd12c4d82a5 100644
--- a/drivers/firmware/qcom/qcom_scm.c
+++ b/drivers/firmware/qcom/qcom_scm.c
@@ -2320,7 +2320,7 @@ int qcom_scm_wait_for_wq_completion(u32 wq_ctx)
 	if (IS_ERR(wq))
 		return PTR_ERR(wq);
 
-	wait_for_completion(wq);
+	wait_for_completion_state(wq, TASK_IDLE);
 
 	return 0;
 }

-- 
2.34.1