Re: [PATCHv2] ata: pata_ep93xx: fix PIO fallback when DMA init fails

[Damien Le Moal]

On 7/20/26 11:02, Rosen Penev wrote:
> ep93xx_pata_dma_init() returns an error when dma_request_chan() fails,
> which causes ep93xx_pata_probe() to abort entirely.  The probe function
> already has a PIO fallback path (it checks both channel pointers before
> enabling UDMA), so the DMA init should not fail the probe on non-fatal
> errors.
> 
> Propagate -EPROBE_DEFER, such that we allow the DMA controller driver
> to load, in case we got probed before the DMA controller driver.
> For all other failures (e.g. -ENODEV when the DMA controller is missing
> in the device tree), fall back to PIO.
> 
> Assisted-by: Opencode:Big-Pickle
> Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>

Applied to for-7.3. Thanks!

-- 
Damien Le Moal
Western Digital Research