From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Thu, 9 Nov 2023 10:10:09 +0000 (+0200)
Subject: software node: Let args be NULL in software_node_get_reference_args
X-Git-Tag: v6.6.17~897
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2b327d0fe0d2f18c5f3c01905019d0192565bbe8;p=platform%2Fkernel%2Flinux-rpi.git

software node: Let args be NULL in software_node_get_reference_args

[ Upstream commit 1eaea4b3604eb9ca7d9a1e73d88fc121bb4061f5 ]

fwnode_get_property_reference_args() may not be called with args argument
NULL and while OF already supports this. Add the missing NULL check.

The purpose is to be able to count the references.

Fixes: b06184acf751 ("software node: Add software_node_get_reference_args()")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20231109101010.1329587-3-sakari.ailus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index 1886995..079bd14 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -541,6 +541,9 @@ software_node_get_reference_args(const struct fwnode_handle *fwnode,
 	if (nargs > NR_FWNODE_REFERENCE_ARGS)
 		return -EINVAL;
 
+	if (!args)
+		return 0;
+
 	args->fwnode = software_node_get(refnode);
 	args->nargs = nargs;