From: frowand.list@gmail.com
To: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] of: detect invalid phandle in overlay
Date: Wed, 21 Jun 2017 12:21:56 -0700 [thread overview]
Message-ID: <1498072916-4664-1-git-send-email-frowand.list@gmail.com> (raw)
From: Frank Rowand <frank.rowand@sony.com>
Overlays are not allowed to modify phandle values of previously existing
nodes because there is no information available to allow fixup up
properties that use the previously existing phandle.
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
---
drivers/of/overlay.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index 7827786718d8..c0e4ee1cd1ba 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -132,6 +132,10 @@ static int of_overlay_apply_single_device_node(struct of_overlay *ov,
/* NOTE: Multiple mods of created nodes not supported */
tchild = of_get_child_by_name(target, cname);
if (tchild != NULL) {
+ /* new overlay phandle value conflicts with existing value */
+ if (child->phandle)
+ return -EINVAL;
+
/* apply overlay recursively */
ret = of_overlay_apply_one(ov, tchild, child);
of_node_put(tchild);
--
Frank Rowand <frank.rowand@sony.com>
next reply other threads:[~2017-06-21 19:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-21 19:21 frowand.list [this message]
2017-06-22 16:19 ` [PATCH] of: detect invalid phandle in overlay Rob Herring
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