[PATCH] [MTD] Correct partition failed erase address

[Adrian Hunter <ext-adrian.hunter@nokia.com>]

If an erase operation fails, the address at which the
failure occurred is returned by the driver.  The MTD
partition must adjust this address (by subtracting the
partition offset) before returning to the caller.
This was not happening, which caused JFFS2 to mark
the wrong block bad!

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
---
 drivers/mtd/mtdpart.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 633def3..476fbb6 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -200,6 +200,11 @@ static int part_erase (struct mtd_info *
 		return -EINVAL;
 	instr->addr += part->offset;
 	ret = part->master->erase(part->master, instr);
+	if (ret) {
+		if (instr->fail_addr != 0xffffffff)
+			instr->fail_addr -= part->offset;
+		instr->addr -= part->offset;
+	}
 	return ret;
 }
 
@@ -559,4 +564,3 @@ EXPORT_SYMBOL_GPL(deregister_mtd_parser)
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>");
 MODULE_DESCRIPTION("Generic support for partitioning of MTD devices");
-
-- 
1.4.3