On Mon, Jan 18, 2021 at 5:05 AM Mathias Nyman mathias.nyman@linux.intel.com wrote: <>
True, good point, dma_wmb() should be enough here. In fact most other wmb()s in xhci could be turned into dma_wmb().
FWIW I've confirmed in my testing that dma_wmb() does indeed also solve the problem.