openwrtv4/target/linux/brcm47xx/patches-3.18/400-mtd-bcm47xxpart-get-nvram.patch
Rafał Miłecki 917fb76321 brcm47xx: rename (and refresh) MTD patch for safety "nvram" partition
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 44854
2015-03-17 07:07:00 +00:00

34 lines
1 KiB
Diff

--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -97,6 +97,7 @@ static int bcm47xxpart_parse(struct mtd_
int trx_part = -1;
int last_trx_part = -1;
int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, };
+ bool found_nvram = false;
/*
* Some really old flashes (like AT45DB*) had smaller erasesize-s, but
@@ -300,12 +301,23 @@ static int bcm47xxpart_parse(struct mtd_
if (buf[0] == NVRAM_HEADER) {
bcm47xxpart_add_part(&parts[curr_part++], "nvram",
master->size - blocksize, 0);
+ found_nvram = true;
break;
}
}
kfree(buf);
+ if (!found_nvram) {
+ pr_err("can not find a nvram partition reserve last block\n");
+ bcm47xxpart_add_part(&parts[curr_part++], "nvram_guess",
+ master->size - blocksize * 2, MTD_WRITEABLE);
+ for (i = 0; i < curr_part; i++) {
+ if (parts[i].size + parts[i].offset == master->size)
+ parts[i].offset -= blocksize * 2;
+ }
+ }
+
/*
* Assume that partitions end at the beginning of the one they are
* followed by.