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From: Alex Elder <elder@linaro.org>
To: ohad@wizery.com, bjorn.andersson@linaro.org
Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/5] remoteproc: Make start and stop in subdev optional
Date: Tue, 26 Jun 2018 07:11:56 -0500	[thread overview]
Message-ID: <20180626121159.7267-3-elder@linaro.org> (raw)
In-Reply-To: <20180626121159.7267-1-elder@linaro.org>

From: Bjorn Andersson <bjorn.andersson@linaro.org>

Some subdevices, such as glink ssr only care about the stop operation,
so make the operations optional to reduce client code.

Tested-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by Alex Elder <elder@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 5dd58e6bea88..981ae6dff145 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -780,16 +780,20 @@ static int rproc_start_subdevices(struct rproc *rproc)
 	int ret;
 
 	list_for_each_entry(subdev, &rproc->subdevs, node) {
-		ret = subdev->start(subdev);
-		if (ret)
-			goto unroll_registration;
+		if (subdev->start) {
+			ret = subdev->start(subdev);
+			if (ret)
+				goto unroll_registration;
+		}
 	}
 
 	return 0;
 
 unroll_registration:
-	list_for_each_entry_continue_reverse(subdev, &rproc->subdevs, node)
-		subdev->stop(subdev, true);
+	list_for_each_entry_continue_reverse(subdev, &rproc->subdevs, node) {
+		if (subdev->stop)
+			subdev->stop(subdev, true);
+	}
 
 	return ret;
 }
@@ -798,8 +802,10 @@ static void rproc_stop_subdevices(struct rproc *rproc, bool crashed)
 {
 	struct rproc_subdev *subdev;
 
-	list_for_each_entry_reverse(subdev, &rproc->subdevs, node)
-		subdev->stop(subdev, crashed);
+	list_for_each_entry_reverse(subdev, &rproc->subdevs, node) {
+		if (subdev->stop)
+			subdev->stop(subdev, crashed);
+	}
 }
 
 /**
-- 
2.17.1

  parent reply	other threads:[~2018-06-26 12:11 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-26 12:11 [PATCH v2 0/5] remoteproc: updates for new events Alex Elder
2018-06-26 12:11 ` [PATCH v2 1/5] remoteproc: Rename subdev functions to start/stop Alex Elder
2018-06-26 12:11 ` Alex Elder [this message]
2018-06-26 12:11 ` [PATCH v2 3/5] remoteproc: Make client initialize ops in rproc_subdev Alex Elder
2018-06-26 12:11 ` [PATCH v2 4/5] remoteproc: rename subdev probe and remove functions Alex Elder
2018-06-26 12:11 ` [PATCH v2 5/5] remoteproc: Introduce prepare and unprepare for subdevices Alex Elder

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