remoteproc: qcom: q6v5: Set q6 state to offline on receiving wdog irq

Bugzilla: https://bugzilla.redhat.com/2150444

commit 0ad7e3e
Author: Siddharth Gupta <sidgup@codeaurora.org>
Date:   Tue Jul 5 17:38:18 2022 +0530

    remoteproc: qcom: q6v5: Set q6 state to offline on receiving wdog irq

    Due to firmware bugs on the Q6 the hardware watchdog irq can be triggered
    multiple times. As the remoteproc framework schedules work items for the
    recovery process, if the other threads do not get a chance to run before
    recovery is completed the proceeding threads will see the state of the
    remoteproc as running and kill the remoteproc while it is running. This
    can result in various SMMU and NOC errors. This change sets the state of
    the remoteproc to offline whenever a watchdog irq is received.

    Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
    Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
    Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
    Link: https://lore.kernel.org/r/1657022900-2049-6-git-send-email-quic_sibis@quicinc.com

Signed-off-by: Eric Chanudet <echanude@redhat.com>

Author: eric-ch

drivers/remoteproc/qcom_q6v5.c

@@ -112,6 +112,7 @@ static irqreturn_t q6v5_wdog_interrupt(int irq, void *data)
 	else
 		dev_err(q6v5->dev, "watchdog without message\n");
 
+	q6v5->running = false;
 	rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG);
 
 	return IRQ_HANDLED;
@@ -123,6 +124,9 @@ static irqreturn_t q6v5_fatal_interrupt(int irq, void *data)
 	size_t len;
 	char *msg;
 
+	if (!q6v5->running)
+		return IRQ_HANDLED;
+
 	msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);
 	if (!IS_ERR(msg) && len > 0 && msg[0])
 		dev_err(q6v5->dev, "fatal error received: %s\n", msg);