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bcm63xx: Really fix the flash driver in 2.6.37

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Read back the actual rootfs length from the image tag.

Signed-off-by: Jonas Gorski <jonas.gorski+openwrt@gmail.com>

SVN-Revision: 25938
This commit is contained in:
Florian Fainelli 2011-03-07 16:55:01 +00:00
parent b52beae1af
commit aa580d336b
1 changed files with 45 additions and 0 deletions
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45
target/linux/brcm63xx/patches-2.6.37/041-bcm963xx_real_rootfs_length.patch Normal file
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@ -0,0 +1,45 @@
--- a/arch/mips/include/asm/mach-bcm63xx/bcm963xx_tag.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm963xx_tag.h
@@ -86,8 +86,10 @@ struct bcm_tag {
char rootfs_crc[CRC_LEN];
/* 224-227: CRC32 of kernel partition */
char kernel_crc[CRC_LEN];
- /* 228-235: Unused at present */
- char reserved1[8];
+ /* 228-231: OpenWrt: real rootfs length */
+ char real_rootfs_length[4];
+ /* 222-235: Unused at present */
+ char reserved1[4];
/* 236-239: CRC32 of header excluding tagVersion */
char header_crc[CRC_LEN];
/* 240-255: Unused at present */
--- a/drivers/mtd/maps/bcm963xx-flash.c
+++ b/drivers/mtd/maps/bcm963xx-flash.c
@@ -64,7 +64,7 @@ static int parse_cfe_partitions(struct m
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;
char *boardid;
@@ -85,7 +85,7 @@ static int parse_cfe_partitions(struct m
sscanf(buf->kernel_address, "%u", &kerneladdr);
sscanf(buf->kernel_length, "%u", &kernellen);
- sscanf(buf->total_length, "%u", &totallen);
+ rootfslen = *(uint32_t *)(&(buf->real_rootfs_length));
tagversion = &(buf->tag_version[0]);
boardid = &(buf->board_id[0]);
@@ -94,7 +94,8 @@ static int parse_cfe_partitions(struct m
kerneladdr = kerneladdr - BCM63XX_EXTENDED_SIZE;
rootfsaddr = kerneladdr + kernellen;
- spareaddr = roundup(totallen, master->erasesize) + master->erasesize;
+ rootfslen = roundup(rootfslen, master->erasesize);
+ spareaddr = rootfsaddr + rootfslen;
sparelen = master->size - spareaddr - master->erasesize;
rootfslen = spareaddr - rootfsaddr;