[U-Boot] [PATCH v2 1/2] cmd_sf: let "sf update" erase last sector as a whole

[Gerlando Falauto]

make "sf update" work with unaligned `len' parameter, by deleting the
whole last sector before writing, so to allow for:

 sf update ${load_addr_r} 0 ${filesize}

Signed-off-by: Gerlando Falauto <gerlando.falauto at keymile.com>
Cc: Valentin Longchamp <valentin.longchamp at keymile.com>
Cc: Holger Brunck <holger.brunck at keymile.com>
Acked-by: Simon Glass <sjg at chromium.org>
---
 common/cmd_sf.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index 19b0dc9..ab35a94 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -160,7 +160,8 @@ static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
 		*skipped += len;
 		return NULL;
 	}
-	if (spi_flash_erase(flash, offset, len))
+	/* Erase the entire sector */
+	if (spi_flash_erase(flash, offset, flash->sector_size))
 		return "erase";
 	if (spi_flash_write(flash, offset, len, buf))
 		return "write";
-- 
1.7.10.1