6.6-stable review patch. If anyone has any objections, please let me know.
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From: Zijun Hu quic_zijuhu@quicinc.com
[ Upstream commit eb50844d728f11e87491f7c7af15a4a737f1159d ]
Currently, the following two macros have different values:
// The maximal argument count for firmware node reference #define NR_FWNODE_REFERENCE_ARGS 8 // The maximal argument count for DT node reference #define MAX_PHANDLE_ARGS 16
It may cause firmware node reference's argument count out of range if directly assign DT node reference's argument count to firmware's.
drivers/of/property.c:of_fwnode_get_reference_args() is doing the direct assignment, so may cause firmware's argument count @args->nargs got out of range, namely, in [9, 16].
Fix by increasing NR_FWNODE_REFERENCE_ARGS to 16 to meet DT requirement. Will align both macros later to avoid such inconsistency.
Fixes: 3e3119d3088f ("device property: Introduce fwnode_property_get_reference_args") Signed-off-by: Zijun Hu quic_zijuhu@quicinc.com Acked-by: Sakari Ailus sakari.ailus@linux.intel.com Link: https://lore.kernel.org/r/20250225-fix_arg_count-v4-1-13cdc519eb31@quicinc.c... Signed-off-by: Rob Herring (Arm) robh@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/fwnode.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 525cc031596b6..7efb4493e51c0 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -83,7 +83,7 @@ struct fwnode_endpoint { #define SWNODE_GRAPH_PORT_NAME_FMT "port@%u" #define SWNODE_GRAPH_ENDPOINT_NAME_FMT "endpoint@%u"
-#define NR_FWNODE_REFERENCE_ARGS 8 +#define NR_FWNODE_REFERENCE_ARGS 16
/** * struct fwnode_reference_args - Fwnode reference with additional arguments