linux-kernel - [PATCH 1/2] remoteproc: qcom: q6v5: Update running state before requesting stop

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Message-Id: <20200602163257.26978-1-sibis@codeaurora.org>
Date:   Tue,  2 Jun 2020 22:02:56 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     bjorn.andersson@...aro.org
Cc:     agross@...nel.org, linux-arm-msm@...r.kernel.org,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        evgreen@...omium.org, ohad@...ery.com, rohitkr@...eaurora.org,
        Sibi Sankar <sibis@...eaurora.org>, stable@...r.kernel.org
Subject: [PATCH 1/2] remoteproc: qcom: q6v5: Update running state before requesting stop

Sometimes the stop triggers a watchdog rather than a stop-ack. Update
the running state to false on requesting stop to skip the watchdog
instead.

Error Logs:
$ echo stop > /sys/class/remoteproc/remoteproc0/state
ipa 1e40000.ipa: received modem stopping event
remoteproc-modem: watchdog received: sys_m_smsm_mpss.c:291:APPS force stop
qcom-q6v5-mss 4080000.remoteproc-modem: port failed halt
ipa 1e40000.ipa: received modem offline event
remoteproc0: stopped remote processor 4080000.remoteproc-modem

Fixes: 3b415c8fb263 ("remoteproc: q6v5: Extract common resource handling")
Cc: stable@...r.kernel.org
Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---
 drivers/remoteproc/qcom_q6v5.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c
index 111a442c993c4..fd6fd36268d93 100644
--- a/drivers/remoteproc/qcom_q6v5.c
+++ b/drivers/remoteproc/qcom_q6v5.c
@@ -153,6 +153,8 @@ int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5)
 {
 	int ret;
 
+	q6v5->running = false;
+
 	qcom_smem_state_update_bits(q6v5->state,
 				    BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));
 
-- 
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