linux-kernel - [PATCH v2 2/2] remoteproc: enhance rproc

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Message-ID: <20230322040933.924813-3-tanmay.shah@amd.com>
Date:   Tue, 21 Mar 2023 21:09:36 -0700
From:   Tanmay Shah <tanmay.shah@....com>
To:     <andersson@...nel.org>, <mathieu.poirier@...aro.org>
CC:     <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Tanmay Shah <tanmay.shah@....com>,
        Tarak Reddy <tarak.reddy@....com>
Subject: [PATCH v2 2/2] remoteproc: enhance rproc_put() for clusters

This patch enhances rproc_put() to support remoteproc clusters
with multiple child nodes as in rproc_get_by_phandle().

Signed-off-by: Tarak Reddy <tarak.reddy@....com>
Signed-off-by: Tanmay Shah <tanmay.shah@....com>
---
 drivers/remoteproc/remoteproc_core.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index a3e7c8798381..e7e451012615 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -2560,6 +2560,19 @@ EXPORT_SYMBOL(rproc_free);
 void rproc_put(struct rproc *rproc)
 {
 	module_put(rproc->dev.parent->driver->owner);
+	struct platform_device *cluster_pdev;
+
+	if (rproc->dev.parent) {
+		if (rproc->dev.parent->driver) {
+			module_put(rproc->dev.parent->driver->owner);
+		} else {
+			cluster_pdev = of_find_device_by_node(rproc->dev.parent->of_node->parent);
+			if (cluster_pdev) {
+				module_put(cluster_pdev->dev.driver->owner);
+				put_device(&cluster_pdev->dev);
+			}
+		}
+	}
 	put_device(&rproc->dev);
 }
 EXPORT_SYMBOL(rproc_put);
-- 
2.25.1