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software node: Let args be NULL in software_node_get_reference_args

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[ Upstream commit 1eaea4b360 ]

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: b06184acf7 ("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>
This commit is contained in:
Sakari Ailus 2023-11-09 12:10:09 +02:00 committed by Greg Kroah-Hartman
parent 893c3ca250
commit 3f9ec4227e
1 changed files with 3 additions and 0 deletions
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3
drivers/base/swnode.c
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@ -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;