[patch 37/87] mtd_dataflash: unbreak erase support

[Greg KH]

2.6.29-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Peter Korsgaard <jacmet@xxxxxxxxxx>

commit dbf8c11f821b6ff83302c34f2403b4f7231f50ae upstream.

Commit 5b7f3a50 (fix dataflash 64-bit divisions) unfortunately
introduced a typo. Erase addr and len were swapped in the pageaddr
calculation, causing the wrong sectors to get erased.

Signed-off-by: Peter Korsgaard <jacmet@xxxxxxxxxx>
Acked-by: Artem Bityutskiy <Artem.Bityutskiy@xxxxxxxxx>
Signed-off-by: David Woodhouse <David.Woodhouse@xxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/mtd/devices/mtd_dataflash.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mtd/devices/mtd_dataflash.c
+++ b/drivers/mtd/devices/mtd_dataflash.c
@@ -184,7 +184,7 @@ static int dataflash_erase(struct mtd_in
 		/* Calculate flash page address; use block erase (for speed) if
 		 * we're at a block boundary and need to erase the whole block.
 		 */
-		pageaddr = div_u64(instr->len, priv->page_size);
+		pageaddr = div_u64(instr->addr, priv->page_size);
 		do_block = (pageaddr & 0x7) == 0 && instr->len >= blocksize;
 		pageaddr = pageaddr << priv->page_offset;
 


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