[PATCH] v850: Round up length passed to slram driver to a multiple of SLRAM_BLK_SZ
Signed-off-by: Miles Bader <miles@gnu.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/v850/kernel/setup.c b/arch/v850/kernel/setup.c
index c41d72b..4a222dc 100644
--- a/arch/v850/kernel/setup.c
+++ b/arch/v850/kernel/setup.c
@@ -1,8 +1,8 @@
/*
* arch/v850/kernel/setup.c -- Arch-dependent initialization functions
*
- * Copyright (C) 2001,02,03 NEC Electronics Corporation
- * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
+ * Copyright (C) 2001,02,03,05 NEC Electronics Corporation
+ * Copyright (C) 2001,02,03,05 Miles Bader <miles@gnu.org>
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file COPYING in the main directory of this
@@ -98,10 +98,20 @@
}
#ifdef CONFIG_MTD
+
+/* From drivers/mtd/devices/slram.c */
+#define SLRAM_BLK_SZ 0x4000
+
/* Set the root filesystem to be the given memory region.
Some parameter may be appended to CMD_LINE. */
void set_mem_root (void *addr, size_t len, char *cmd_line)
{
+ /* Some sort of idiocy in MTD means we must supply a length that's
+ a multiple of SLRAM_BLK_SZ. We just round up the real length,
+ as the file system shouldn't attempt to access anything beyond
+ the end of the image anyway. */
+ len = (((len - 1) + SLRAM_BLK_SZ) / SLRAM_BLK_SZ) * SLRAM_BLK_SZ;
+
/* The only way to pass info to the MTD slram driver is via
the command line. */
if (*cmd_line) {
