video: rockchip: rk3288: fix extend screen type error

[firefly-linux-kernel-4.4.55.git] / drivers / of / fdt.c

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index d2430298a309a86d3f2110623d3728b9dedb228f..86fff625f6d5770ec493a301a30be8d3bfa11831 100644 (file)
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/initrd.h>
 #include <linux/memblock.h>
+#include <linux/mutex.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
 #include <linux/of_reserved_mem.h>
@@ -436,6 +437,8 @@ static void *kernel_tree_alloc(u64 size, u64 align)
        return kzalloc(size, GFP_KERNEL);
 }
 
+static DEFINE_MUTEX(of_fdt_unflatten_mutex);
+
 /**
  * of_fdt_unflatten_tree - create tree of device_nodes from flat blob
  *
@@ -447,7 +450,9 @@ static void *kernel_tree_alloc(u64 size, u64 align)
 void of_fdt_unflatten_tree(const unsigned long *blob,
                        struct device_node **mynodes)
 {
+       mutex_lock(&of_fdt_unflatten_mutex);
        __unflatten_device_tree(blob, mynodes, &kernel_tree_alloc);
+       mutex_unlock(&of_fdt_unflatten_mutex);
 }
 EXPORT_SYMBOL_GPL(of_fdt_unflatten_tree);
 
@@ -933,36 +938,66 @@ int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
        return 0;
 }
 
+/*
+ * Convert configs to something easy to use in C code
+ */
+#if defined(CONFIG_CMDLINE_FORCE)
+static const int overwrite_incoming_cmdline = 1;
+static const int read_dt_cmdline;
+static const int concat_cmdline;
+#elif defined(CONFIG_CMDLINE_EXTEND)
+static const int overwrite_incoming_cmdline;
+static const int read_dt_cmdline = 1;
+static const int concat_cmdline = 1;
+#else /* CMDLINE_FROM_BOOTLOADER */
+static const int overwrite_incoming_cmdline;
+static const int read_dt_cmdline = 1;
+static const int concat_cmdline;
+#endif
+
+#ifdef CONFIG_CMDLINE
+static const char *config_cmdline = CONFIG_CMDLINE;
+#else
+static const char *config_cmdline = "";
+#endif
+
 int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
                                     int depth, void *data)
 {
-       int l;
-       const char *p;
+       int l = 0;
+       const 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);
 
-       /* 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));
-
-       /*
-        * 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
-#ifndef CONFIG_CMDLINE_FORCE
-       if (!((char *)data)[0])
-#endif
-               strlcpy(data, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
-#endif /* CONFIG_CMDLINE */
+       /* Put CONFIG_CMDLINE in if forced or if data had nothing in it to start */
+       if (overwrite_incoming_cmdline || !cmdline[0])
+               strlcpy(cmdline, config_cmdline, COMMAND_LINE_SIZE);
+
+       /* Retrieve command line unless forcing */
+       if (read_dt_cmdline)
+               p = of_get_flat_dt_prop(node, "bootargs", &l);
+
+       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));
+               }
+       }
 
        pr_debug("Command line is: %s\n", (char*)data);
 
@@ -1041,7 +1076,7 @@ void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
 int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base,
                                        phys_addr_t size, bool nomap)
 {
-       pr_err("Reserved memory not supported, ignoring range 0x%pa - 0x%pa%s\n",
+       pr_err("Reserved memory not supported, ignoring range %pa - %pa%s\n",
                  &base, &size, nomap ? " (nomap)" : "");
        return -ENOSYS;
 }