Re: [PATCH] mtd: nand: raw: qcom_nandc: Don't clear_bam_transaction on READID

Konrad Dybcio
2022-01-13T18:45:45Z

On 13.01.2022 19:44, Konrad Dybcio wrote:
> While I have absolutely 0 idea why and how, running clear_bam_transaction
> when READID is issued makes the DMA totally clog up and refuse to function
> at all on mdm9607. In fact, it is so bad that all the data gets garbled
> and after a short while in the nand probe flow, the CPU decides that
> sepuku is the only option.
>
> Removing _READID from the if condition makes it work like a charm, I can
> read data and mount partitions without a problem.
>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
> ---
> This is totally just an observation which took me an inhumane amount of
> debug prints to find.. perhaps there's a better reason behind this, but
> I can't seem to find any answers.. Therefore, this is a BIG RFC!
>
Somehow I didn't put RFC in the title though, sorry!

Konrad