Re: [PATCH 1/5] spi: cadence-xspi: Reconfigure to STIG mode before SPI message

[Mark Brown]

> The .transfer_one_message() function uses the STIG mode, therefore the
> xSPI needs to be configured to STIG mode before starting any transfer.
> 
> Without this, .transfer_one_message() simply won't work, at least on the
> CN10K SoC.

> @@ -1112,6 +1123,11 @@ static int cdns_xspi_transfer_one_message_b0(struct spi_controller *controller,
>  	int current_transfer_len;
>  	int cs = spi_get_chipselect(spi, 0);
>  	int cs_change = 0;
> +	int ret;
> +
> +	ret = cdns_xspi_set_stig_mode(cdns_xspi);
> +	if (ret)
> +		return ret;

If we return an error we need to also set m->status otherwise it'll be
stuck at -EINPROGESS and we will get confused.  This is a preexisting
bug in other bits of the function :/

-- 
Mark Brown <broonie@xxxxxxxxxx>