linux-kernel - [PATCH] of: Fix of platform build on powerpc due to bad of disaply code

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Date:   Wed, 18 Jan 2023 22:50:45 +0100
From:   Michal Suchanek <msuchanek@...e.de>
To:     "Erhard F." <erhard_f@...lbox.org>
Cc:     Michal Suchanek <msuchanek@...e.de>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE" 
        <devicetree@...r.kernel.org>, linuxppc-dev@...ts.ozlabs.org,
        Javier Martinez Canillas <javierm@...hat.com>,
        open list <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Frank Rowand <frowand.list@...il.com>
Subject: [PATCH] of: Fix of platform build on powerpc due to bad of disaply code


The commit 2d681d6a23a1 ("of: Make of framebuffer devices unique")
breaks build because of wrong argument to snprintf. That certainly
avoids the runtime error but is not the intended outcome.

Fixes: 2d681d6a23a1 ("of: Make of framebuffer devices unique")
Signed-off-by: Michal Suchanek <msuchanek@...e.de>
---
 drivers/of/platform.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index f2a5d679a324..e9dd7371f27a 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -564,10 +564,10 @@ static int __init of_platform_default_populate_init(void)
 		}
 
 		for_each_node_by_type(node, "display") {
-			char *buf[14];
+			char buf[14];
 			if (!of_get_property(node, "linux,opened", NULL) || node == boot_display)
 				continue;
-			ret = snprintf(buf, "of-display-%d", display_number++);
+			ret = snprintf(buf, sizeof(buf), "of-display-%d", display_number++);
 			if (ret >= sizeof(buf))
 				continue;
 			of_platform_device_create(node, buf, NULL);
-- 
2.35.3