cmd_sf: let "sf update" erase last sector as a whole

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@keymile.com>
Cc: Valentin Longchamp <valentin.longchamp@keymile.com>
Cc: Holger Brunck <holger.brunck@keymile.com>
Acked-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>

diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index 34844ac..4af0f0a 100644 (file)
--- 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";