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[83.173.201.248]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48e1d830e91sm6114754f8f.54.2026.10.20.06.00.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Oct 2026 06:00:21 -0700 (PDT) From: Ernest Van Hoecke Date: Tue, 20 Oct 2026 15:00:14 +0200 Subject: [PATCH v3 3/8] of: property: fw_devlink: Report unsupported supplier linking X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261020-fw-devlink-nexus-ready-v3-3-fd6f1c17e16d@toradex.com> References: <20261020-fw-devlink-nexus-ready-v3-0-fd6f1c17e16d@toradex.com> In-Reply-To: <20261020-fw-devlink-nexus-ready-v3-0-fd6f1c17e16d@toradex.com> To: Rob Herring , Saravana Kannan Cc: "Miquel Raynal (Schneider Electric)" , Frank Li , Kieran Bingham , Pengutronix Kernel Team , Stephen Boyd , Brian Masney , Linus Walleij , Bartosz Golaszewski , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Herve Codina , Greg Kroah-Hartman , Geert Uytterhoeven , Leonardo Costa , Frieder Schrempf , devicetree@vger.kernel.org, linux-clk@vger.kernel.org, linux-gpio@vger.kernel.org, linux-pwm@vger.kernel.org, linux-kernel@vger.kernel.org, Ernest Van Hoecke X-Mailer: b4 0.13.0 From: Ernest Van Hoecke OF supplier linking is deliberately disabled on OLPC and Intel CE4100 systems. The add_links operation currently returns zero on these systems, so callers cannot distinguish unsupported linking from success. Return -EOPNOTSUPP when supplier linking is unsupported. This allows OF unit tests to skip link assertions on these systems without exposing the private platform-support predicate. The driver core ignores the add_links return value and marks the fwnode as processed regardless, so its link creation and retry behavior remain unchanged. Reviewed-by: Herve Codina Signed-off-by: Ernest Van Hoecke --- drivers/of/property.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/of/property.c b/drivers/of/property.c index aa65976739e1..99381c07848d 100644 --- a/drivers/of/property.c +++ b/drivers/of/property.c @@ -1708,7 +1708,7 @@ static int of_fwnode_add_links(struct fwnode_handle *fwnode) struct device_node *con_np = to_of_node(fwnode); if (!of_is_fwnode_add_links_supported()) - return 0; + return -EOPNOTSUPP; if (!con_np) return -EINVAL; -- 2.43.0