From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Fri, 25 Nov 2022 18:45:02 +0100
Subject: [PATCH] misc: fastrpc: Fix an error handling path in
 fastrpc_rpmsg_probe()
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: 11819ed2b70da94acc41fec34178a011c4d3d25d

[ Upstream commit 11819ed2b70da94acc41fec34178a011c4d3d25d ]

If of_platform_populate() fails, some resources need to be freed as already
done in the other error handling paths.

Fixes: 278d56f970ae ("misc: fastrpc: Reference count channel context")
Fixes: 3abe3ab3cdab ("misc: fastrpc: add secure domain support")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/b909d2f3273b794ea0f1f78d14bc24affb08ea5f.1669398274.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/misc/fastrpc.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 53106061..7ccaca1b 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -2315,7 +2315,18 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
 	data->domain_id = domain_id;
 	data->rpdev = rpdev;
 
-	return of_platform_populate(rdev->of_node, NULL, NULL, rdev);
+	err = of_platform_populate(rdev->of_node, NULL, NULL, rdev);
+	if (err)
+		goto populate_error;
+
+	return 0;
+
+populate_error:
+	if (data->fdevice)
+		misc_deregister(&data->fdevice->miscdev);
+	if (data->secure_fdevice)
+		misc_deregister(&data->secure_fdevice->miscdev);
+
 fdev_error:
 	kfree(data);
 	return err;
-- 
2.35.3