On Fri, Apr 25, 2025 at 04:08:47PM +0800, Zongmin Zhou wrote: > Dear Greg and Christoph: > > This patch is the simple solution for the issue described in below link: > https://lore.kernel.org/all/20250219092555.112631-1-min_halo@xxxxxxx/ > > This issue has been discussed at length with Shuah. > > As Christoph said,vhci-hcd is a virtual hci, > but it serves as a bridge to connect virtual USB devices to the real USB > controller. > Since the commit d74ffae8b8dd is applied on kernel v5.3, > the virtual USB devices's max_sectors size is limited since v5.3. > > Just because on vhci-hcd, the dma mask setting follows the platform device > default setting(32-bit). Wait, why is vhci-hcd a platform device at all? It shouldn't be doing that, try removing that to start with, which will remove that "default" setting. I recommend using the faux bus as a potential replacement. thanks, greg k-h
