[PATCH] mtd: bcm47xxpart: find NVRAM partitions in middle blocks
Rafał Miłecki
zajec5 at gmail.com
Thu Aug 14 01:22:46 PDT 2014
Old devices used to have NVRAM at the very end of flash and they could
be unaligned (starting at some offset in a block).
In new devices NVRAM can be located quite randomly, however it seems to
always start at the beginning of a block. For example Netgear R6250 has
NVRAM located right after the bootloader, before the kernel partition.
Signed-off-by: Rafał Miłecki <zajec5 at gmail.com>
---
drivers/mtd/bcm47xxpart.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/mtd/bcm47xxpart.c b/drivers/mtd/bcm47xxpart.c
index adfa74c..407a444 100644
--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -199,6 +199,13 @@ static int bcm47xxpart_parse(struct mtd_info *master,
continue;
}
+ /* New (ARM?) devices may have NVRAM in some middle block */
+ if (buf[0x000 / 4] == NVRAM_HEADER) {
+ bcm47xxpart_add_part(&parts[curr_part++], "nvram",
+ offset, 0);
+ continue;
+ }
+
/* Read middle of the block */
if (mtd_read(master, offset + 0x8000, 0x4,
&bytes_read, (uint8_t *)buf) < 0) {
--
1.8.4.5
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