Merge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6

1 files changed, 33 insertions, 4 deletions

diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c
index 5526375..a13a08b 100644
--- a/arch/mips/txx9/generic/setup.c
+++ b/arch/mips/txx9/generic/setup.c
@@ -156,11 +156,23 @@ static struct txx9_board_vec *__init find_board_byname(const char *name)
 
 static void __init prom_init_cmdline(void)
 {
-	int argc = (int)fw_arg0;
-	int *argv32 = (int *)fw_arg1;
+	int argc;
+	int *argv32;
 	int i;			/* Always ignore the "-c" at argv[0] */
 	char builtin[CL_SIZE];
 
+	if (fw_arg0 >= CKSEG0 || fw_arg1 < CKSEG0) {
+		/*
+		 * argc is not a valid number, or argv32 is not a valid
+		 * pointer
+		 */
+		argc = 0;
+		argv32 = NULL;
+	} else {
+		argc = (int)fw_arg0;
+		argv32 = (int *)fw_arg1;
+	}
+
 	/* ignore all built-in args if any f/w args given */
 	/*
 	 * But if built-in strings was started with '+', append them
@@ -414,10 +426,12 @@ char * __init prom_getcmdline(void)
 
 const char *__init prom_getenv(const char *name)
 {
-	const s32 *str = (const s32 *)fw_arg2;
+	const s32 *str;
 
-	if (!str)
+	if (fw_arg2 < CKSEG0)
 		return NULL;
+
+	str = (const s32 *)fw_arg2;
 	/* YAMON style ("name", "value" pairs) */
 	while (str[0] && str[1]) {
 		if (!strcmp((const char *)(unsigned long)str[0], name))
@@ -622,6 +636,21 @@ unsigned long (*__swizzle_addr_b)(unsigned long port) = __swizzle_addr_none;
 EXPORT_SYMBOL(__swizzle_addr_b);
 #endif
 
+#ifdef NEEDS_TXX9_IOSWABW
+static u16 ioswabw_default(volatile u16 *a, u16 x)
+{
+	return le16_to_cpu(x);
+}
+static u16 __mem_ioswabw_default(volatile u16 *a, u16 x)
+{
+	return x;
+}
+u16 (*ioswabw)(volatile u16 *a, u16 x) = ioswabw_default;
+EXPORT_SYMBOL(ioswabw);
+u16 (*__mem_ioswabw)(volatile u16 *a, u16 x) = __mem_ioswabw_default;
+EXPORT_SYMBOL(__mem_ioswabw);
+#endif
+
 void __init txx9_physmap_flash_init(int no, unsigned long addr,
 				    unsigned long size,
 				    const struct physmap_flash_data *pdata)