On Thu, Mar 28, 2024 at 12:06:32PM -0400, Frank Li wrote: > dma_set_mask_and_coherent() will never return failure when mask >= 32bit. > So needn't fall back to set dma_set_mask_and_coherent(32). > > Even if dma_set_mask_and_coherent(48) failure, > dma_set_mask_and_coherent(32) will be failure according to the same reason. > > The function dma_set_mask_and_coherent() defines the device DMA access > address width. If it's capable of accessing 48 bits, it inherently supports > 32-bit space as well. > > Signed-off-by: Frank Li <Frank.Li@xxxxxxx> > --- Kishon, do you remember why you set the DMA mask to 48-bits in the first place? It seems a bit random. Kind regards, Niklas
