linux-kernel - [PATCH v2 3/3] of: property: Don't add links to absent suppliers

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Date:   Mon,  1 Feb 2021 20:33:44 -0800
From:   Saravana Kannan <saravanak@...gle.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Marc Zyngier <maz@...nel.org>,
        Tudor Ambarus <Tudor.Ambarus@...rochip.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Martin Kaiser <martin@...ser.cx>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Len Brown <lenb@...nel.org>,
        Saravana Kannan <saravanak@...gle.com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-acpi@...r.kernel.org, kernel-team@...roid.com
Subject: [PATCH v2 3/3] of: property: Don't add links to absent suppliers

If driver core marks a firmware node as not a device, don't add fwnode
links where it's a supplier.

Fixes: e590474768f1 ("driver core: Set fw_devlink=on by default")
Signed-off-by: Saravana Kannan <saravanak@...gle.com>
---
 drivers/of/property.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/of/property.c b/drivers/of/property.c
index 6287c6d60bb7..53d163c8d39b 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -1103,7 +1103,9 @@ static int of_link_to_phandle(struct device_node *con_np,
 	 * created for them.
 	 */
 	sup_dev = get_dev_from_fwnode(&sup_np->fwnode);
-	if (!sup_dev && of_node_check_flag(sup_np, OF_POPULATED)) {
+	if (!sup_dev &&
+	    (of_node_check_flag(sup_np, OF_POPULATED) ||
+	     sup_np->fwnode.flags & FWNODE_FLAG_NOT_DEVICE)) {
 		pr_debug("Not linking %pOFP to %pOFP - No struct device\n",
 			 con_np, sup_np);
 		of_node_put(sup_np);
-- 
2.30.0.365.g02bc693789-goog