Re: [PATCH 2/2] of: addr: Translate 'dma-ranges' for parent nodes missing 'dma-ranges'

On Fri, 26 Feb 2021 at 00:36, Bin Meng bmeng.cn@gmail.com wrote:

'dma-ranges' frequently exists without parent nodes having 'dma-ranges'. While this is an error for 'ranges', this is fine because DMA capable devices always have a translatable DMA address. Also, with no 'dma-ranges' at all, the assumption is that DMA addresses are 1:1 with no restrictions unless perhaps the device itself has implicit restrictions.

This keeps in sync with Linux kernel commit:

81db12ee15cb: of/address: Translate 'dma-ranges' for parent nodes missing 'dma-ranges'

Signed-off-by: Bin Meng bmeng.cn@gmail.com

drivers/core/of_addr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Simon Glass sjg@chromium.org