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dfu: dfu_mtd: set max_buf_size to erasesize also for NOR devices

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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>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Patrick Delaunay 2021-03-04 17:47:56 +01:00 • committed by Patrice Chotard
parent 88f7ca03b4
commit 2dc41fccf3
1 changed files with 1 additions and 4 deletions
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5
drivers/dfu/dfu_mtd.c
View file

@ -254,7 +254,6 @@ 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);
@ -264,9 +263,7 @@ 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")) {