[PATCH v2 2/5] spi: spi-mtk-nor: fix mishandled logics in checking SPI memory operation

[Chuanhong Guo]

Hi!

On Fri, Sep 18, 2020 at 9:09 PM Chuanhong Guo <gch981213 at gmail.com> wrote:
> On Fri, Sep 18, 2020 at 4:34 PM Ikjoon Jang <ikjn at chromium.org> wrote:
> > [...]
> > +               switch (op->data.dir) {
> > +               case SPI_MEM_DATA_IN:
> > +                       if (!mtk_nor_match_read(op))
> > +                               return -EINVAL;
>
> You are changing the code logic here.
> mtk_nor_match_read checks if the operation can be executed
> using controller PIO/DMA reading. Even if it's not supported,
> we can still use PRG mode to execute the operation.
> One example of such an operation is SPI NOR SFDP reading.
> Your change breaks that which then breaks 1_2_2 and 1_4_4
> reading capability because spi-nor driver parses these op formats
> from SFDP table.

I just noticed that you already broke this in:
spi: spi-mtk-nor: support standard spi properties
Please also fix the same logic in mtk_nor_supports_op in your v3.

-- 
Regards,
Chuanhong Guo