[U-Boot] [PATCH v2] dfu, nand: before write a buffer to nand, erase the nand sectors

[Heiko Schocher <hs@denx.de>]

before writing the received buffer to nand, erase the nand
sectors. If not doing this, nand write fails. See for
more info here:

http://lists.denx.de/pipermail/u-boot/2013-June/156361.html

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@ti.com>

---
- changes for v2:
  - use opts.spread as Scott Wood suggested

 drivers/dfu/dfu_nand.c | 17 +++++++++++++++--
 1 Datei ge?ndert, 15 Zeilen hinzugef?gt(+), 2 Zeilen entfernt(-)

diff --git a/drivers/dfu/dfu_nand.c b/drivers/dfu/dfu_nand.c
index 7dc89b2..93db9bd 100644
--- a/drivers/dfu/dfu_nand.c
+++ b/drivers/dfu/dfu_nand.c
@@ -63,12 +63,25 @@ static int nand_block_op(enum dfu_nand_op op, struct dfu_entity *dfu,
 
 	nand = &nand_info[nand_curr_device];
 
-	if (op == DFU_OP_READ)
+	if (op == DFU_OP_READ) {
 		ret = nand_read_skip_bad(nand, start, &count, &actual,
 				lim, buf);
-	else
+	} else {
+		nand_erase_options_t opts;
+
+		memset(&opts, 0, sizeof(opts));
+		opts.offset = start;
+		opts.length = count;
+		opts.spread = 1;
+		opts.quiet = 1;
+		/* first erase */
+		ret = nand_erase_opts(nand, &opts);
+		if (ret)
+			return ret;
+		/* then write */
 		ret = nand_write_skip_bad(nand, start, &count, &actual,
 				lim, buf, 0);
+	}
 
 	if (ret != 0) {
 		printf("%s: nand_%s_skip_bad call failed at %llx!\n",
-- 
1.7.11.7