From f4c92582137a645ffc42346d7176ddd1462c2be0 Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Tue, 22 Sep 2015 00:55:00 -0300 Subject: dfu: dfu_sf: Use the erase sector size for erase operations SPI NOR flashes need to erase the entire sector size and we cannot pass any arbitrary length for the erase operation. To illustrate the problem: Copying data from PC to DFU device Download [=========================] 100% 478208 bytes Download done. state(7) = dfuMANIFEST, status(0) = No error condition is present state(10) = dfuERROR, status(14) = Something went wrong, but the device does not know what it was Done! In this case, the binary has 478208 bytes and the M25P32 SPI NOR has an erase sector of 64kB. 478208 = 7 entire sectors of 64kiB + 19456 bytes. Erasing the first seven 64 kB sectors works fine, but when trying to erase the remainding 19456 causes problem and the board hangs. Fix the issue by always erasing with the erase sector size. Signed-off-by: Fabio Estevam Acked-by: Lukasz Majewski --- drivers/dfu/dfu_sf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/dfu') diff --git a/drivers/dfu/dfu_sf.c b/drivers/dfu/dfu_sf.c index c3d3c3b..448d95d 100644 --- a/drivers/dfu/dfu_sf.c +++ b/drivers/dfu/dfu_sf.c @@ -28,7 +28,8 @@ static int dfu_write_medium_sf(struct dfu_entity *dfu, { int ret; - ret = spi_flash_erase(dfu->data.sf.dev, offset, *len); + ret = spi_flash_erase(dfu->data.sf.dev, offset, + dfu->data.sf.dev->sector_size); if (ret) return ret; -- cgit v1.1