For NOR devices the logical DFU buffer size is the sector_size, as it is done in dfu_sf.c or in spi/sf_mtd.c (sf_mtd_info.erasesize = flash->sector_size)
For NAND the DFU size was already limited to erasesize as has_pages = true.
So the mtd dfu backend can use this erasesize for all the MTD devices, NOR and NAND with dfu->max_buf_size = mtd->erasesize
This difference was initially copied from MTD command, where data is fully available in RAM without size limitation.
This patch avoids to have many sector write in dfu_mtd.c at the end of the DFU transfer and avoids issues with USB timeout or WATCHDOG.
Signed-off-by: Patrick Delaunay patrick.delaunay@foss.st.com ---
drivers/dfu/dfu_mtd.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/dfu/dfu_mtd.c b/drivers/dfu/dfu_mtd.c index ca67585a7e..7efb3cbd79 100644 --- a/drivers/dfu/dfu_mtd.c +++ b/drivers/dfu/dfu_mtd.c @@ -252,7 +252,6 @@ int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, char *s) { char *st; struct mtd_info *mtd; - bool has_pages; int ret, part;
mtd = get_mtd_device_nm(devstr); @@ -262,9 +261,7 @@ int dfu_fill_entity_mtd(struct dfu_entity *dfu, char *devstr, char *s)
dfu->dev_type = DFU_DEV_MTD; dfu->data.mtd.info = mtd; - - has_pages = mtd->type == MTD_NANDFLASH || mtd->type == MTD_MLCNANDFLASH; - dfu->max_buf_size = has_pages ? mtd->erasesize : 0; + dfu->max_buf_size = mtd->erasesize;
st = strsep(&s, " "); if (!strcmp(st, "raw")) {