linux-kernel - [PATCH v1 3/3] remoteproc: qcom: q6v5: Avoid setting smem bit in case of crash shutdown

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Date:   Mon, 19 Sep 2022 09:00:40 -0700
From:   Gokul krishna Krishnakumar <quic_gokukris@...cinc.com>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>
CC:     <linux-arm-msm@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        "Satya Durga Srinivasu Prabhala" <quic_satyap@...cinc.com>,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        Elliot Berman <quic_eberman@...cinc.com>,
        "Guru Das Srinagesh" <quic_gurus@...cinc.com>,
        Gokul krishna Krishnakumar <quic_gokukris@...cinc.com>
Subject: [PATCH v1 3/3] remoteproc: qcom: q6v5: Avoid setting smem bit in case of crash shutdown

Avoid setting smem bit in case of crash shutdown, as remote
processor is not able to send the ack back.

Change-Id: I33f19087627e5a7fe2c3bcce377b51b903574bc4
Signed-off-by: Gokul krishna Krishnakumar <quic_gokukris@...cinc.com>
---
 drivers/remoteproc/qcom_q6v5.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c
index 1b9e1e1..569427a 100644
--- a/drivers/remoteproc/qcom_q6v5.c
+++ b/drivers/remoteproc/qcom_q6v5.c
@@ -237,8 +237,10 @@ int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5, struct qcom_sysmon *sysmon)
 
 	q6v5->running = false;
 
-	/* Don't perform SMP2P dance if sysmon already shut down the remote */
-	if (qcom_sysmon_shutdown_acked(sysmon))
+	/* Don't perform SMP2P dance if sysmon already shut
+	 * down the remote or if it isn't running
+	 */
+	if (q6v5->rproc->state != RPROC_RUNNING || qcom_sysmon_shutdown_acked(sysmon))
 		return 0;
 
 	qcom_smem_state_update_bits(q6v5->state,
-- 
2.7.4