From dc9c1ac1f7c854717e054772ea527fcceb6ee397 Mon Sep 17 00:00:00 2001
From: Daniel Dickinson <crazycshore@gmail.com>
Date: Tue, 28 Dec 2010 08:10:32 +0000
Subject: [PATCH] patches-2.6.35: mtd flashmap: Really fixed sparelen and
rootfslen. The real rootfslen for OpenWRT images comes from a bigendian
uint32_t in reserved1 of the bcm_tag, which is now used to correctly
calculate the rootfslen (and thus the sparelen).
SVN-Revision: 24843
---
.../040-bcm963xx_flashmap.patch | 22 +++++--------------
1 file changed, 5 insertions(+), 17 deletions(-)
diff --git a/target/linux/brcm63xx/patches-2.6.35/040-bcm963xx_flashmap.patch b/target/linux/brcm63xx/patches-2.6.35/040-bcm963xx_flashmap.patch
index 5a5ba12834..29c4f8582e 100644
--- a/target/linux/brcm63xx/patches-2.6.35/040-bcm963xx_flashmap.patch
+++ b/target/linux/brcm63xx/patches-2.6.35/040-bcm963xx_flashmap.patch
@@ -73,7 +73,7 @@ Signed-off-by: Axel Gembe <ago@bastart.eu.org>
+obj-$(CONFIG_MTD_BCM963XX) += bcm963xx-flash.o
--- /dev/null
+++ b/drivers/mtd/maps/bcm963xx-flash.c
-@@ -0,0 +1,288 @@
+@@ -0,0 +1,276 @@
+/*
+ * Copyright (C) 2006-2008 Florian Fainelli <florian@openwrt.org>
+ * Mike Albon <malbon@openwrt.org>
@@ -136,12 +136,11 @@ Signed-off-by: Axel Gembe <ago@bastart.eu.org>
+ int ret;
+ size_t retlen;
+ unsigned int rootfsaddr, kerneladdr, spareaddr;
-+ unsigned int rootfslen, kernellen, sparelen, totallen;
++ unsigned int rootfslen, kernellen, sparelen;
+ int namelen = 0;
+ int i, offset;
+ char *boardid;
-+ char *tagversion;
-+ struct squashfs_super_block sb;
++ char *tagversion;
+
+ /* Allocate memory for buffer */
+ buf = vmalloc(sizeof(struct bcm_tag));
@@ -157,8 +156,7 @@ Signed-off-by: Axel Gembe <ago@bastart.eu.org>
+
+ sscanf(buf->kernelAddress, "%u", &kerneladdr);
+ sscanf(buf->kernelLength, "%u", &kernellen);
-+ sscanf(buf->totalLength, "%u", &totallen);
-+ sscanf(buf->rootLength, "%u", &rootfslen);
++ rootfslen = *(uint32_t *)(&(buf->rootLength[0]));
+ tagversion = &(buf->tagVersion[0]);
+ boardid = &(buf->boardid[0]);
+
@@ -167,20 +165,10 @@ Signed-off-by: Axel Gembe <ago@bastart.eu.org>
+ kerneladdr = kerneladdr - EXTENDED_SIZE;
+ rootfsaddr = kerneladdr + kernellen;
+
-+ // offset = master->erasesize + sizeof(struct bcm_tag) + kernellen;
-+ offset = rootfsaddr;
-+ ret = master->read(master, offset, sizeof(sb), &retlen, (void *) &sb);
-+ if (ret || (retlen != sizeof(sb))) {
-+ printk(KERN_ALERT PFX "parse_cfe_partitions: error occured while reading "
-+ "from \"%s\"\n", master->name);
-+ return -EINVAL;
-+ }
-+
+ rootfslen = ( ( rootfslen % master->erasesize ) > 0 ? (((rootfslen / master->erasesize) + 1 ) * master->erasesize) : rootfslen);
-+ totallen = rootfslen + kernellen + sizeof(struct bcm_tag);
+
+ spareaddr = rootfsaddr + rootfslen;
-+ sparelen = master->size - totallen - master->erasesize;
++ sparelen = master->size - spareaddr - master->erasesize;
+
+ /* Determine number of partitions */
+ namelen = 8;
--
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