On Mon, Dec 31, 2018 at 8:52 PM Yong Wu <yong.wu@xxxxxxxxxxxx> wrote: > > The iommu consumer should use device_link to connect with the > smi-larb(supplier). then the smi-larb should run before the iommu > consumer. Here we delay the iommu driver until the smi driver is > ready, then all the iommu consumer always is after the smi driver. > > When there is no this patch, if some consumer drivers run before > smi-larb, the supplier link_status is DL_DEV_NO_DRIVER(0) in the > device_link_add, then device_links_driver_bound will use WARN_ON > to complain that the link_status of supplier is not right. > I don't quite have enough knowledge of device links to figure out if this is a) the right fix, b) a deficiency in the device_links code, or c) neither. Perhaps someone else could chime in on this one. -Evan
