Re: [PATCH v4 01/13] mtd: spi-nor: core: Don't use mtd_info in the NOR's probe sequence of calls

[<Tudor.Ambarus@microchip.com>]

On 11/30/21 11:56 AM, Pratyush Yadav wrote:
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> 
> On 22/11/21 11:50AM, Tudor Ambarus wrote:
>> Use NOR parameters in the probe's sequence of calls, thus
>> nor->params->size instead of nor->mtd.size and let the mtd_info
>> fields be used by the mtd calls (mtd->_erase, mtd->_read, mtd->_write).
>> mtd_info fields should not be used during probe because we haven't
>> registered mtd yet.
> 
> These changes look good to me, but there is one thing this seems to be
> missing. In xlinx.c, I see that xilinx_setup() sets nor->mtd.size. I
> think it should be updated to set nor->params->size instead otherwise

thanks, you're correct. But I should better do it as a separate patch
that fixes:
Fixes: 641edddb4f43 ("mtd: spi-nor: Add s3an_post_sfdp_fixups()")
because mtd->size is overwritten in that patch with
mtd->size = params->size;
while it should have kept its s3an specific value.

Will respin the entire series with this change as the first patch.

> functions like spi_nor_set_addr_width() might end up using the wrong
> value.
> 
>>
>> Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
> 
>> ---
>> v4: new patch
>>
>>  drivers/mtd/spi-nor/core.c | 8 ++++----
>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
>> index 88dd0908d172..5b9c827d411c 100644
>> --- a/drivers/mtd/spi-nor/core.c
>> +++ b/drivers/mtd/spi-nor/core.c
>> @@ -2115,7 +2115,7 @@ static int spi_nor_spimem_check_op(struct spi_nor *nor,
>>        */
>>       op->addr.nbytes = 4;
>>       if (!spi_mem_supports_op(nor->spimem, op)) {
>> -             if (nor->mtd.size > SZ_16M)
>> +             if (nor->params->size > SZ_16M)
>>                       return -EOPNOTSUPP;
>>
>>               /* If flash size <= 16MB, 3 address bytes are sufficient */
>> @@ -3011,7 +3011,7 @@ static int spi_nor_set_addr_width(struct spi_nor *nor)
>>               nor->addr_width = 3;
>>       }
>>
>> -     if (nor->addr_width == 3 && nor->mtd.size > 0x1000000) {
>> +     if (nor->addr_width == 3 && nor->params->size > 0x1000000) {
>>               /* enable 4-byte addressing if the device exceeds 16MiB */
>>               nor->addr_width = 4;
>>       }
>> @@ -3245,7 +3245,7 @@ static int spi_nor_create_read_dirmap(struct spi_nor *nor)
>>                                     SPI_MEM_OP_DUMMY(nor->read_dummy, 0),
>>                                     SPI_MEM_OP_DATA_IN(0, NULL, 0)),
>>               .offset = 0,
>> -             .length = nor->mtd.size,
>> +             .length = nor->params->size,
>>       };
>>       struct spi_mem_op *op = &info.op_tmpl;
>>
>> @@ -3276,7 +3276,7 @@ static int spi_nor_create_write_dirmap(struct spi_nor *nor)
>>                                     SPI_MEM_OP_NO_DUMMY,
>>                                     SPI_MEM_OP_DATA_OUT(0, NULL, 0)),
>>               .offset = 0,
>> -             .length = nor->mtd.size,
>> +             .length = nor->params->size,
>>       };
>>       struct spi_mem_op *op = &info.op_tmpl;
>>
>> --
>> 2.25.1
>>
> 
> --
> Regards,
> Pratyush Yadav
> Texas Instruments Inc.
> 

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