linux-kernel - [PATCH 5.4 071/152] remoteproc: qcom: q6v5: Update running state before requesting stop

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Message-Id: <20200820091557.359022608@linuxfoundation.org>
Date:   Thu, 20 Aug 2020 11:20:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Evan Green <evgreen@...omium.org>,
        Sibi Sankar <sibis@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: [PATCH 5.4 071/152] remoteproc: qcom: q6v5: Update running state before requesting stop

From: Sibi Sankar <sibis@...eaurora.org>

commit 5b7be880074c73540948f8fc597e0407b98fabfa upstream.

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

Reviewed-by: Evan Green <evgreen@...omium.org>
Fixes: 3b415c8fb263 ("remoteproc: q6v5: Extract common resource handling")
Cc: stable@...r.kernel.org
Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
Link: https://lore.kernel.org/r/20200602163257.26978-1-sibis@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/remoteproc/qcom_q6v5.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/remoteproc/qcom_q6v5.c
+++ b/drivers/remoteproc/qcom_q6v5.c
@@ -151,6 +151,8 @@ int qcom_q6v5_request_stop(struct qcom_q
 {
 	int ret;
 
+	q6v5->running = false;
+
 	qcom_smem_state_update_bits(q6v5->state,
 				    BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));