Hi Alexander, On Tue, Apr 18, 2023 at 5:35 AM Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx> wrote: > > If dma_request_chan() fails, no error is shown nor any information is > shown in /sys/kernel/debug/devices_deferred if -EPROBE_DEFER is returned. > Use dev_err_probe to fix both problems. Running spi-imx without SDMA is valid and not an error, right? I am not sure I understood the real motivation for this patch.