diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-3.8/024-Revert-mtd-bcm47xxpart-improve-probing-of-nvram-part.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.8/024-Revert-mtd-bcm47xxpart-improve-probing-of-nvram-part.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.8/024-Revert-mtd-bcm47xxpart-improve-probing-of-nvram-part.patch b/target/linux/brcm47xx/patches-3.8/024-Revert-mtd-bcm47xxpart-improve-probing-of-nvram-part.patch new file mode 100644 index 000000000..0fc78c535 --- /dev/null +++ b/target/linux/brcm47xx/patches-3.8/024-Revert-mtd-bcm47xxpart-improve-probing-of-nvram-part.patch @@ -0,0 +1,61 @@ +--- a/drivers/mtd/bcm47xxpart.c ++++ b/drivers/mtd/bcm47xxpart.c +@@ -19,6 +19,12 @@ + /* 10 parts were found on sflash on Netgear WNDR4500 */ + #define BCM47XXPART_MAX_PARTS 12 + ++/* ++ * Amount of bytes we read when analyzing each block of flash memory. ++ * Set it big enough to allow detecting partition and reading important data. ++ */ ++#define BCM47XXPART_BYTES_TO_READ 0x404 ++ + /* Magics */ + #define BOARD_DATA_MAGIC 0x5246504D /* MPFR */ + #define POT_MAGIC1 0x54544f50 /* POTT */ +@@ -57,17 +63,14 @@ static int bcm47xxpart_parse(struct mtd_ + struct trx_header *trx; + int trx_part = -1; + int last_trx_part = -1; +- int max_bytes_to_read = 0x8004; + + if (blocksize <= 0x10000) + blocksize = 0x10000; +- if (blocksize == 0x20000) +- max_bytes_to_read = 0x18004; + + /* Alloc */ + parts = kzalloc(sizeof(struct mtd_partition) * BCM47XXPART_MAX_PARTS, + GFP_KERNEL); +- buf = kzalloc(max_bytes_to_read, GFP_KERNEL); ++ buf = kzalloc(BCM47XXPART_BYTES_TO_READ, GFP_KERNEL); + + /* Parse block by block looking for magics */ + for (offset = 0; offset <= master->size - blocksize; +@@ -82,7 +85,7 @@ static int bcm47xxpart_parse(struct mtd_ + } + + /* Read beginning of the block */ +- if (mtd_read(master, offset, max_bytes_to_read, ++ if (mtd_read(master, offset, BCM47XXPART_BYTES_TO_READ, + &bytes_read, (uint8_t *)buf) < 0) { + pr_err("mtd_read error while parsing (offset: 0x%X)!\n", + offset); +@@ -97,16 +100,9 @@ static int bcm47xxpart_parse(struct mtd_ + } + + /* Standard NVRAM */ +- if (buf[0x000 / 4] == NVRAM_HEADER || +- buf[0x1000 / 4] == NVRAM_HEADER || +- buf[0x8000 / 4] == NVRAM_HEADER || +- (blocksize == 0x20000 && ( +- buf[0x10000 / 4] == NVRAM_HEADER || +- buf[0x11000 / 4] == NVRAM_HEADER || +- buf[0x18000 / 4] == NVRAM_HEADER))) { ++ if (buf[0x000 / 4] == NVRAM_HEADER) { + bcm47xxpart_add_part(&parts[curr_part++], "nvram", + offset, 0); +- offset = rounddown(offset, blocksize); + continue; + } + |