linux-kernel - [PATCH 1/2] Revert "of: fdt: Honor CONFIG

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Message-Id: <20230103-dt-cmdline-fix-v1-1-7038e88b18b6@kernel.org>
Date:   Tue, 03 Jan 2023 12:00:31 -0600
From:   Rob Herring <robh@...nel.org>
To:     Geoff Levand <geoff@...radead.org>,
        Alexander Sverdlin <alexander.sverdlin@...il.com>,
        Frank Rowand <frowand.list@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] Revert "of: fdt: Honor CONFIG_CMDLINE* even without /chosen node"

This reverts commit a7d550f82b445cf218b47a2c1a9c56e97ecb8c7a.

Some arches (PPC at least) don't call early_init_dt_scan_nodes(), so
moving the cmdline processing there breaks them.

Reported-by: Geoff Levand <geoff@...radead.org>
Cc: Alexander Sverdlin <alexander.sverdlin@...il.com>
Signed-off-by: Rob Herring <robh@...nel.org>
---
 drivers/of/fdt.c | 40 ++++++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index b2272bccf85c..7b571a631639 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -1173,6 +1173,26 @@ int __init early_init_dt_scan_chosen(char *cmdline)
 	if (p != NULL && l > 0)
 		strscpy(cmdline, p, min(l, COMMAND_LINE_SIZE));
 
+	/*
+	 * CONFIG_CMDLINE is meant to be a default in case nothing else
+	 * managed to set the command line, unless CONFIG_CMDLINE_FORCE
+	 * is set in which case we override whatever was found earlier.
+	 */
+#ifdef CONFIG_CMDLINE
+#if defined(CONFIG_CMDLINE_EXTEND)
+	strlcat(cmdline, " ", COMMAND_LINE_SIZE);
+	strlcat(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#elif defined(CONFIG_CMDLINE_FORCE)
+	strscpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#else
+	/* No arguments from boot loader, use kernel's  cmdl*/
+	if (!((char *)cmdline)[0])
+		strscpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#endif
+#endif /* CONFIG_CMDLINE */
+
+	pr_debug("Command line is: %s\n", (char *)cmdline);
+
 	rng_seed = of_get_flat_dt_prop(node, "rng-seed", &l);
 	if (rng_seed && l > 0) {
 		add_bootloader_randomness(rng_seed, l);
@@ -1277,26 +1297,6 @@ void __init early_init_dt_scan_nodes(void)
 	if (rc)
 		pr_warn("No chosen node found, continuing without\n");
 
-	/*
-	 * CONFIG_CMDLINE is meant to be a default in case nothing else
-	 * managed to set the command line, unless CONFIG_CMDLINE_FORCE
-	 * is set in which case we override whatever was found earlier.
-	 */
-#ifdef CONFIG_CMDLINE
-#if defined(CONFIG_CMDLINE_EXTEND)
-	strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
-	strlcat(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
-#elif defined(CONFIG_CMDLINE_FORCE)
-	strscpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
-#else
-	/* No arguments from boot loader, use kernel's cmdl */
-	if (!boot_command_line[0])
-		strscpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
-#endif
-#endif /* CONFIG_CMDLINE */
-
-	pr_debug("Command line is: %s\n", boot_command_line);
-
 	/* Setup memory, calling early_init_dt_add_memory_arch */
 	early_init_dt_scan_memory();
 

-- 
2.39.0