Re: [PATCH v2 1/2] usbip: Skip DMA mapping and unmapping for urb at vhci

2019-07-23 Thread Suwan Kim
On Mon, Jul 22, 2019 at 02:26:42PM -0600, shuah wrote: > Hi Suwan, > > On 7/5/19 10:43 AM, Suwan Kim wrote: > > vhci doesn’t do DMA for remote device. Actually, the real DMA > > operation is done by network card driver. vhci just passes virtual > > address of the buffer to the network stack, so vh

Re: [PATCH v2 1/2] usbip: Skip DMA mapping and unmapping for urb at vhci

2019-07-22 Thread shuah
Hi Suwan, On 7/5/19 10:43 AM, Suwan Kim wrote: vhci doesn’t do DMA for remote device. Actually, the real DMA operation is done by network card driver. vhci just passes virtual address of the buffer to the network stack, so vhci doesn’t use and need dma address of the buffer of the URB. When it