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From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: ohad@wizery.com, bjorn.andersson@linaro.org, robh+dt@kernel.org
Cc: linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, arnaud.pouliquen@st.com
Subject: [PATCH v3 12/15] remoteproc: Properly deal with a stop request when attached
Date: Thu, 26 Nov 2020 14:06:39 -0700	[thread overview]
Message-ID: <20201126210642.897302-13-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <20201126210642.897302-1-mathieu.poirier@linaro.org>

This patch introduces the capability to stop a remote processor
that has been attached to by the remoteproc core.  For that to
happen a rproc::ops::stop() operation need to be available.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
---
 drivers/remoteproc/remoteproc_cdev.c  | 5 +++--
 drivers/remoteproc/remoteproc_core.c  | 6 +++++-
 drivers/remoteproc/remoteproc_sysfs.c | 5 +++--
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c
index b19ea3057bde..d06f8d4919c7 100644
--- a/drivers/remoteproc/remoteproc_cdev.c
+++ b/drivers/remoteproc/remoteproc_cdev.c
@@ -37,10 +37,11 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_
 
 		ret = rproc_boot(rproc);
 	} else if (!strncmp(cmd, "stop", len)) {
-		if (rproc->state != RPROC_RUNNING)
+		if (rproc->state != RPROC_RUNNING &&
+		    rproc->state != RPROC_ATTACHED)
 			return -EINVAL;
 
-		rproc_shutdown(rproc);
+		ret = rproc_shutdown(rproc);
 	} else {
 		dev_err(&rproc->dev, "Unrecognized option\n");
 		ret = -EINVAL;
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 51275107eb1f..3d7d245edc4e 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1642,6 +1642,10 @@ static int rproc_stop(struct rproc *rproc, bool crashed)
 	struct device *dev = &rproc->dev;
 	int ret;
 
+	/* No need to continue if a stop() operation has not been provided */
+	if (!rproc->ops->stop)
+		return -EINVAL;
+
 	/* Stop any subdevices for the remote processor */
 	rproc_stop_subdevices(rproc, crashed);
 
@@ -1880,7 +1884,7 @@ int rproc_shutdown(struct rproc *rproc)
 		return ret;
 	}
 
-	if (rproc->state != RPROC_RUNNING) {
+	if (rproc->state != RPROC_RUNNING && rproc->state != RPROC_ATTACHED) {
 		ret = -EPERM;
 		goto out;
 	}
diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index f9694def9b54..3696f2ccc785 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -201,10 +201,11 @@ static ssize_t state_store(struct device *dev,
 		if (ret)
 			dev_err(&rproc->dev, "Boot failed: %d\n", ret);
 	} else if (sysfs_streq(buf, "stop")) {
-		if (rproc->state != RPROC_RUNNING)
+		if (rproc->state != RPROC_RUNNING &&
+		    rproc->state != RPROC_ATTACHED)
 			return -EINVAL;
 
-		rproc_shutdown(rproc);
+		ret = rproc_shutdown(rproc);
 	} else {
 		dev_err(&rproc->dev, "Unrecognised option: %s\n", buf);
 		ret = -EINVAL;
-- 
2.25.1


  parent reply	other threads:[~2020-11-26 21:07 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-26 21:06 [PATCH v3 00/15] remoteproc: Add support for detaching from rproc Mathieu Poirier
2020-11-26 21:06 ` [PATCH v3 01/15] dt-bindings: remoteproc: Add bindind to support autonomous processors Mathieu Poirier
2020-11-30 17:23   ` Rob Herring
2020-11-30 17:33   ` Rob Herring
2020-12-01 23:43     ` Mathieu Poirier
2020-12-10 23:10       ` Rob Herring
2020-11-26 21:06 ` [PATCH v3 02/15] remoteproc: Re-check state in rproc_shutdown() Mathieu Poirier
2020-11-26 21:06 ` [PATCH v3 03/15] remoteproc: Remove useless check in rproc_del() Mathieu Poirier
2020-11-26 21:06 ` [PATCH v3 04/15] remoteproc: Add new RPROC_ATTACHED state Mathieu Poirier
2020-11-26 21:06 ` [PATCH v3 05/15] remoteproc: Properly represent the attached state Mathieu Poirier
2020-11-26 21:06 ` [PATCH v3 06/15] remoteproc: Properly deal with a kernel panic when attached Mathieu Poirier
2020-11-26 21:06 ` [PATCH v3 07/15] remoteproc: Add new detach() remoteproc operation Mathieu Poirier
2020-12-02 18:13   ` Arnaud POULIQUEN
2020-11-26 21:06 ` [PATCH v3 08/15] remoteproc: Introduce function __rproc_detach() Mathieu Poirier
2020-11-26 21:06 ` [PATCH v3 09/15] remoteproc: Introduce function rproc_detach() Mathieu Poirier
2020-12-08 18:35   ` Arnaud POULIQUEN
2020-12-08 20:25     ` Mathieu Poirier
2020-12-09  0:53     ` Mathieu Poirier
2020-12-09  8:45       ` Arnaud POULIQUEN
2020-12-09 21:18         ` Mathieu Poirier
2020-12-10  8:51           ` Arnaud POULIQUEN
2020-11-26 21:06 ` [PATCH v3 10/15] remoteproc: Rename function rproc_actuate() Mathieu Poirier
2020-11-26 21:06 ` [PATCH v3 11/15] remoteproc: Add return value to function rproc_shutdown() Mathieu Poirier
2020-12-02 18:14   ` Arnaud POULIQUEN
2020-11-26 21:06 ` Mathieu Poirier [this message]
2020-11-26 21:06 ` [PATCH v3 13/15] remoteproc: Properly deal with a start request when attached Mathieu Poirier
2020-12-02 18:14   ` Arnaud POULIQUEN
2020-11-26 21:06 ` [PATCH v3 14/15] remoteproc: Properly deal with detach request Mathieu Poirier
2020-12-09  8:47   ` Arnaud POULIQUEN
2020-11-26 21:06 ` [PATCH v3 15/15] remoteproc: Refactor rproc delete and cdev release path Mathieu Poirier
2020-12-09 10:13   ` Arnaud POULIQUEN
2020-12-09 21:34     ` Mathieu Poirier

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