linux-kernel - [PATCH] scripts: dtc: fix a false alarm for node_name_chars

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Message-ID: <20220531053358.19003-1-qun-wei.lin@mediatek.com>
Date:   Tue, 31 May 2022 13:33:58 +0800
From:   Qun-Wei Lin <qun-wei.lin@...iatek.com>
To:     <robh+dt@...nel.org>, <frowand.list@...il.com>,
        <matthias.bgg@...il.com>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <casper.li@...iatek.com>,
        <chinwen.chang@...iatek.com>, <kuan-ying.lee@...iatek.com>,
        Qun-Wei Lin <qun-wei.lin@...iatek.com>
Subject: [PATCH] scripts: dtc: fix a false alarm for node_name_chars_strict

The function check_node_name_chars_strict issues a false alarm when
compiling an overlay dts.

/fragment@..._overlay__: Character '_' not recommended in node name

This workaround will fix it by skip checking for node named __overlay__.

Signed-off-by: Qun-Wei Lin <qun-wei.lin@...iatek.com>
---
 scripts/dtc/checks.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/dtc/checks.c b/scripts/dtc/checks.c
index 781ba1129a8e..6ef4f2cd67b9 100644
--- a/scripts/dtc/checks.c
+++ b/scripts/dtc/checks.c
@@ -325,6 +325,11 @@ static void check_node_name_chars_strict(struct check *c, struct dt_info *dti,
 {
 	int n = strspn(node->name, c->data);
 
+	if (streq(node->name, "__overlay__")) {
+		/* HACK: Overlay fragments are a special case */
+		return;
+	}
+
 	if (n < node->basenamelen)
 		FAIL(c, dti, node, "Character '%c' not recommended in node name",
 		     node->name[n]);
-- 
2.18.0