You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
2.0 KiB
Diff
59 lines
2.0 KiB
Diff
From e88c206c101194b8513860c135ee77366d7456eb Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Fri, 5 Dec 2014 17:26:26 +0000
|
|
Subject: [PATCH 050/304] fdt: Add support for the CONFIG_CMDLINE_EXTEND option
|
|
|
|
---
|
|
drivers/of/fdt.c | 29 ++++++++++++++++++++++++-----
|
|
1 file changed, 24 insertions(+), 5 deletions(-)
|
|
|
|
--- a/drivers/of/fdt.c
|
|
+++ b/drivers/of/fdt.c
|
|
@@ -954,22 +954,38 @@ int __init early_init_dt_scan_chosen(uns
|
|
|
|
/* Retrieve command line */
|
|
p = of_get_flat_dt_prop(node, "bootargs", &l);
|
|
- if (p != NULL && l > 0)
|
|
- strlcpy(data, p, min((int)l, COMMAND_LINE_SIZE));
|
|
- p = of_get_flat_dt_prop(node, "bootargs-append", &l);
|
|
- if (p != NULL && l > 0)
|
|
- strlcat(data, p, min_t(int, strlen(data) + (int)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.
|
|
+ *
|
|
+ * However, it can be useful to be able to treat the default as
|
|
+ * a starting point to be extended using CONFIG_CMDLINE_EXTEND.
|
|
*/
|
|
+ ((char *)data)[0] = '\0';
|
|
+
|
|
#ifdef CONFIG_CMDLINE
|
|
-#ifndef CONFIG_CMDLINE_FORCE
|
|
- if (!((char *)data)[0])
|
|
+ strlcpy(data, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
|
|
+
|
|
+ if (p != NULL && l > 0) {
|
|
+#if defined(CONFIG_CMDLINE_EXTEND)
|
|
+ int len = strlen(data);
|
|
+ if (len > 0) {
|
|
+ strlcat(data, " ", COMMAND_LINE_SIZE);
|
|
+ len++;
|
|
+ }
|
|
+ strlcpy((char *)data + len, p, min((int)l, COMMAND_LINE_SIZE - len));
|
|
+#elif defined(CONFIG_CMDLINE_FORCE)
|
|
+ pr_warning("Ignoring bootargs property (using the default kernel command line)\n");
|
|
+#else
|
|
+ /* Neither extend nor force - just override */
|
|
+ strlcpy(data, p, min((int)l, COMMAND_LINE_SIZE));
|
|
#endif
|
|
- strlcpy(data, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
|
|
+ }
|
|
+#else /* CONFIG_CMDLINE */
|
|
+ if (p != NULL && l > 0)
|
|
+ strlcpy(data, p, min((int)l, COMMAND_LINE_SIZE));
|
|
#endif /* CONFIG_CMDLINE */
|
|
|
|
pr_debug("Command line is: %s\n", (char*)data);
|