On Fri, Jul 17, 2026 at 02:11:41PM +0800, GuoHan Zhao wrote: > dma_set_mask_and_coherent() can fail when platform DMA operations do not > support the requested 40-bit address mask. Ignoring the error leaves the > previous DMA configuration in place. Probe then continues without ensuring > that DMA addresses are suitable for the NPU. > > Return the error so the driver does not bind with an unsupported DMA > configuration.
Read the documentation. dma_set_mask_and_coherent() will not fail for mask >32. Rob
