From: Hans de Goede <hdego...@redhat.com> According to the xhci spec the total number of streams is 2 ^ (MaxPStreams + 1), and this is also how the Linux xhci driver uses this field.
Signed-off-by: Hans de Goede <hdego...@redhat.com> Signed-off-by: Gerd Hoffmann <kra...@redhat.com> --- hw/usb/hcd-xhci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index f02231d..69d9144 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -1138,7 +1138,7 @@ static void xhci_reset_streams(XHCIEPContext *epctx) static void xhci_alloc_streams(XHCIEPContext *epctx, dma_addr_t base) { assert(epctx->pstreams == NULL); - epctx->nr_pstreams = 2 << epctx->max_pstreams; + epctx->nr_pstreams = 2 << (epctx->max_pstreams + 1); epctx->pstreams = xhci_alloc_stream_contexts(epctx->nr_pstreams, base); } -- 1.8.3.1