From 5832e754fbf502a7d2f2d7bee054eae1b6ad0520 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 25 Jul 2012 17:28:32 +0000
Subject: [PATCH] mtd: fix trx_fixup

With the BRCM47xx image I have built (Linksys E3000), there are additional
writes following the completion of "mtd_replace_jffs2" which invalidate the
'trx_fixup' performed by 'mtd_replace_jffs2'.  Moving the 'trx_fixup' to somewhere
after all writes have completed fixes the problem.  I also noticed that 'erasesize'
used to compute 'block_offset' in 'mtd_fixtrx' is used before it is computed by
'mtd_check_open'; moving the call to 'mtd_check_open' up a few lines fixes this.

Unlike 'mtd_fixtrx', 'trx_fixup' appears to assume that the TRX header is always at
offset 0; which may be the cause of the problem described in Ticket #8960.

Signed-off-by: Nathan Hintz <nlhintz@hotmail.com>

SVN-Revision: 32866
---
 package/mtd/Makefile    | 2 +-
 package/mtd/src/jffs2.c | 3 ---
 package/mtd/src/mtd.c   | 8 +++++++-
 package/mtd/src/trx.c   | 6 +++---
 4 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/package/mtd/Makefile b/package/mtd/Makefile
index 27338d783b..7ca6b0e625 100644
--- a/package/mtd/Makefile
+++ b/package/mtd/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=mtd
-PKG_RELEASE:=17
+PKG_RELEASE:=18
 
 PKG_BUILD_DIR := $(KERNEL_BUILD_DIR)/$(PKG_NAME)
 STAMP_PREPARED := $(STAMP_PREPARED)_$(call confvar,CONFIG_MTD_REDBOOT_PARTS)
diff --git a/package/mtd/src/jffs2.c b/package/mtd/src/jffs2.c
index aaf9be5a92..2a83bd47f4 100644
--- a/package/mtd/src/jffs2.c
+++ b/package/mtd/src/jffs2.c
@@ -244,9 +244,6 @@ int mtd_replace_jffs2(const char *mtd, int fd, int ofs, const char *filename)
 	pad(erasesize);
 	free(buf);
 
-	if (trx_fixup) {
-	  trx_fixup(outfd, mtd);
-	}
 	return (mtdofs - ofs);
 }
 
diff --git a/package/mtd/src/mtd.c b/package/mtd/src/mtd.c
index 92873ca19b..18efcf57cf 100644
--- a/package/mtd/src/mtd.c
+++ b/package/mtd/src/mtd.c
@@ -294,6 +294,7 @@ mtd_write(int imagefd, const char *mtd, char *fis_layout, size_t part_offset)
 	ssize_t r, w, e;
 	ssize_t skip = 0;
 	uint32_t offset = 0;
+	int jffs2_replaced = 0;
 
 #ifdef FIS_SUPPORT
 	static struct fis_part new_parts[MAX_ARGS];
@@ -417,6 +418,7 @@ resume:
 					fprintf(stderr, "\nAppending jffs2 data from %s to %s...", jffs2file, mtd);
 				/* got an EOF marker - this is the place to add some jffs2 data */
 				skip = mtd_replace_jffs2(mtd, fd, e, jffs2file);
+				jffs2_replaced = 1;
 
 				/* don't add it again */
 				jffs2file = NULL;
@@ -482,6 +484,10 @@ resume:
 		offset = 0;
 	}
 
+	if (jffs2_replaced && trx_fixup) {
+		trx_fixup(fd, mtd);
+	}
+
 	if (!quiet)
 		fprintf(stderr, "\b\b\b\b    ");
 
@@ -575,7 +581,7 @@ int main (int argc, char **argv)
 	force = 0;
 	buflen = 0;
 	quiet = 0;
-  no_erase = 0;
+	no_erase = 0;
 
 	while ((ch = getopt(argc, argv,
 #ifdef FIS_SUPPORT
diff --git a/package/mtd/src/trx.c b/package/mtd/src/trx.c
index d1aab36923..65c24404c2 100644
--- a/package/mtd/src/trx.c
+++ b/package/mtd/src/trx.c
@@ -154,15 +154,15 @@ mtd_fixtrx(const char *mtd, size_t offset)
 	if (quiet < 2)
 		fprintf(stderr, "Trying to fix trx header in %s at 0x%x...\n", mtd, offset);
 
-	block_offset = offset & ~(erasesize - 1);
-	offset -= block_offset;
-
 	fd = mtd_check_open(mtd);
 	if(fd < 0) {
 		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
 		exit(1);
 	}
 
+	block_offset = offset & ~(erasesize - 1);
+	offset -= block_offset;
+
 	if (block_offset + erasesize > mtdsize) {
 		fprintf(stderr, "Offset too large, device size 0x%x\n", mtdsize);
 		exit(1);