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-rw-r--r--drivers/of/fdt.c34
1 files changed, 20 insertions, 14 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index ffe1dbc141a4..99a2f7860255 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -685,32 +685,38 @@ static const char *config_cmdline = "";
int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
int depth, void *data)
{
- unsigned long l;
- char *p;
+ unsigned long l = 0;
+ char *p = NULL;
+ char *cmdline = data;
pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
- if (depth != 1 || !data ||
+ if (depth != 1 || !cmdline ||
(strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
return 0;
early_init_dt_check_for_initrd(node);
/* Put CONFIG_CMDLINE in if forced or if data had nothing in it to start */
- if (overwrite_incoming_cmdline || !((char *)data)[0])
- strlcpy(data, config_cmdline, COMMAND_LINE_SIZE);
+ if (overwrite_incoming_cmdline || !cmdline[0])
+ strlcpy(cmdline, config_cmdline, COMMAND_LINE_SIZE);
/* Retrieve command line unless forcing */
- if (read_dt_cmdline) {
+ if (read_dt_cmdline)
p = of_get_flat_dt_prop(node, "bootargs", &l);
- if (p != NULL && l > 0) {
- if (concat_cmdline) {
- strlcat(data, " ", COMMAND_LINE_SIZE);
- strlcat(data, p, min_t(int, (int)l,
- COMMAND_LINE_SIZE));
- } else
- strlcpy(data, p, min_t(int, (int)l,
- COMMAND_LINE_SIZE));
+
+ if (p != NULL && l > 0) {
+ if (concat_cmdline) {
+ int cmdline_len;
+ int copy_len;
+ strlcat(cmdline, " ", COMMAND_LINE_SIZE);
+ cmdline_len = strlen(cmdline);
+ copy_len = COMMAND_LINE_SIZE - cmdline_len - 1;
+ copy_len = min((int)l, copy_len);
+ strncpy(cmdline + cmdline_len, p, copy_len);
+ cmdline[cmdline_len + copy_len] = '\0';
+ } else {
+ strlcpy(cmdline, p, min((int)l, COMMAND_LINE_SIZE));
}
}