linux-kernel - [PATCH v2] ARM: dts: integrator: Fix DMA ranges mismatch warning on IM-PD1

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20251225173118.580110-1-visitorckw@gmail.com>
Date: Thu, 25 Dec 2025 17:31:18 +0000
From: Kuan-Wei Chiu <visitorckw@...il.com>
To: linusw@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	arnd@...db.de
Cc: linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	jserv@...s.ncku.edu.tw,
	eleanor15x@...il.com,
	Kuan-Wei Chiu <visitorckw@...il.com>,
	stable@...r.kernel.org
Subject: [PATCH v2] ARM: dts: integrator: Fix DMA ranges mismatch warning on IM-PD1

When compiling the device tree for the Integrator/AP with IM-PD1, the
following warning is observed regarding the display controller node:

arch/arm/boot/dts/arm/integratorap-im-pd1.dts:251.3-14: Warning
(dma_ranges_format):
/bus@...00000/bus@...00000/display@...0000:dma-ranges: empty
"dma-ranges" property but its #address-cells (2) differs from
/bus@...00000/bus@...00000 (1)

The "dma-ranges" property is intended to describe DMA address
translations for child nodes. However, the only child of the display
controller is a "port" node, which does not perform DMA memory
accesses.

Since the property is not required for the child node and triggers a
warning due to default address cell mismatch, remove it.

Fixes: 7bea67a99430 ("ARM: dts: integrator: Fix DMA ranges")
Cc: stable@...r.kernel.org
Signed-off-by: Kuan-Wei Chiu <visitorckw@...il.com>
---
Changes in v2:
- Switch approach to remove the unused "dma-ranges" property instead of
  adding "#address-cells" and "#size-cells".

 arch/arm/boot/dts/arm/integratorap-im-pd1.dts | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/boot/dts/arm/integratorap-im-pd1.dts b/arch/arm/boot/dts/arm/integratorap-im-pd1.dts
index db13e09f2fab..0e568baf03b0 100644
--- a/arch/arm/boot/dts/arm/integratorap-im-pd1.dts
+++ b/arch/arm/boot/dts/arm/integratorap-im-pd1.dts
@@ -248,7 +248,6 @@ display@...0000 {
 		/* 640x480 16bpp @ 25.175MHz is 36827428 bytes/s */
 		max-memory-bandwidth = <40000000>;
 		memory-region = <&impd1_ram>;
-		dma-ranges;
 
 		port@0 {
 			#address-cells = <1>;
-- 
2.52.0.358.g0dd7633a29-goog