Re: [Uboot-stm32] [PATCH] dfu: dfu_mtd: set max_buf_size to erasesize also for NOR devices

[Lukasz Majewski <lukma@denx.de>]

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Hi Patrick,

> Thanks Patrice,
> 
> On 4/20/21 12:24 PM, Patrice CHOTARD wrote:
> > Hi Patrick
> >
> > On 3/4/21 5:47 PM, Patrick Delaunay wrote:  
> >> 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")) {
> >>  
> > Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
> >
> > Thanks
> >
> > Patrice  
> 
> 
> Lukasz, any remarks on your side?
> 
> 
> Can I take this patch in my first STM32 pull request for v2020.10 ?

Please pull it to your tree.

> 
> or a PR is already planed on your side ?
> 
> http://patchwork.ozlabs.org/project/uboot/patch/20210304174748.1.I1d824180669d63e22275f082e7ac0fe50c2b8646@changeid/
> 
> 
> Regards
> 
> Patrick
> 



Best regards,

Lukasz Majewski

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