I am very glad to get this reply:) Thank you and other experts' kindly help and guide, which improved me a lot.
在 2021/10/21 下午4:35, Greg KH 写道:
On Fri, Oct 15, 2021 at 10:46:55AM +0800, Xianting Tian wrote:Dear all, This patch series make hvc framework pass DMA capable memory to put_chars() of hvc backend(eg, virtio-console), and revert commit c4baad5029 ("virtio-console: avoid DMA from stack”)Thanks for sticking with this, looks much better now, all now queued up. greg k-h