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From: Loic Pallardy <loic.pallardy@st.com>
To: <bjorn.andersson@linaro.org>, <ohad@wizery.com>,
	<mathieu.poirier@linaro.org>
Cc: <linux-remoteproc@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <arnaud.pouliquen@st.com>,
	<benjamin.gaignard@linaro.org>, <fabien.dessenne@st.com>,
	<s-anna@ti.com>, Loic Pallardy <loic.pallardy@st.com>
Subject: [RFC 2/2] remoteproc: core: keep rproc in crash state in case of recovery failure
Date: Wed, 11 Mar 2020 11:54:32 +0100	[thread overview]
Message-ID: <1583924072-20648-3-git-send-email-loic.pallardy@st.com> (raw)
In-Reply-To: <1583924072-20648-1-git-send-email-loic.pallardy@st.com>

When an error occurs during recovery procedure, internal rproc
variables may be unaligned:
- state is set to RPROC_OFFLINE
- power atomic not equal to 0
which is normal as only rproc_stop() has been executed and not
rproc_shutdown()

In such case, rproc_boot() can be re-executed by client to
reboot co-processor.

This patch proposes to keep rproc in RPROC_CRASHED state in case
of recovery failure to be coherent with recovery disabled mode.

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
---
 drivers/remoteproc/remoteproc_core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 7ac87a75cd1b..def4f9fc881d 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1679,6 +1679,12 @@ int rproc_trigger_recovery(struct rproc *rproc)
 	release_firmware(firmware_p);
 
 unlock_mutex:
+	/*
+	 * In case of error during recovery sequence restore rproc
+	 * state in CRASHED
+	 */
+	if (ret)
+		rproc->state = RPROC_CRASHED;
 	mutex_unlock(&rproc->lock);
 	return ret;
 }
-- 
2.7.4


  parent reply	other threads:[~2020-03-11 10:54 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-11 10:54 [RFC 0/2] Allow client to recover crashed processor Loic Pallardy
2020-03-11 10:54 ` [RFC 1/2] remoteproc: sysfs: authorize rproc shutdown when rproc is crashed Loic Pallardy
2020-03-11 21:45   ` Mathieu Poirier
2020-03-12  8:00     ` Loic PALLARDY
2020-03-11 23:27   ` Bjorn Andersson
2020-03-12  8:12     ` Loic PALLARDY
2020-03-25 17:57   ` Mathieu Poirier
2020-03-25 18:30     ` Loic PALLARDY
2020-03-25 21:42       ` Mathieu Poirier
2020-03-11 10:54 ` Loic Pallardy [this message]
2020-05-06  2:05   ` [RFC 2/2] remoteproc: core: keep rproc in crash state in case of recovery failure Bjorn Andersson
2020-03-11 14:56 ` [RFC 0/2] Allow client to recover crashed processor Mathieu Poirier

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