usb-hcd-xhci: Update endpoint context dequeue pointer for streams too

With streams the endpoint context dequeue pointer should point to the
dequeue value for the currently active stream.

At least Linux guests expect it to point to value set by an set_ep_dequeue
upon completion of the set_ep_dequeue (before kicking the ep).

Otherwise the Linux kernel will complain (and things won't work):

xhci_hcd 0000:00:05.0: Mismatch between completed Set TR Deq Ptr command & xHCI internal state.
xhci_hcd 0000:00:05.0: ep deq seg = ffff8800366f0880, deq ptr = ffff8800366ec010

Signed-off-by: Hans de Goede <[email protected]>
Signed-off-by: Gerd Hoffmann <[email protected]>

diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 0131151e93d6673eb5757b25fb07d11f941b18f1..fa27299bf891508f8a9ccf8119e3b9bc0d4081ed 100644 (file)
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -1187,6 +1187,7 @@ static XHCIStreamContext *xhci_find_stream(XHCIEPContext *epctx,
 static void xhci_set_ep_state(XHCIState *xhci, XHCIEPContext *epctx,
                               XHCIStreamContext *sctx, uint32_t state)
 {
+    XHCIRing *ring = NULL;
     uint32_t ctx[5];
     uint32_t ctx2[2];
 
@@ -1197,6 +1198,7 @@ static void xhci_set_ep_state(XHCIState *xhci, XHCIEPContext *epctx,
     /* update ring dequeue ptr */
     if (epctx->nr_pstreams) {
         if (sctx != NULL) {
+            ring = &sctx->ring;
             xhci_dma_read_u32s(xhci, sctx->pctx, ctx2, sizeof(ctx2));
             ctx2[0] &= 0xe;
             ctx2[0] |= sctx->ring.dequeue | sctx->ring.ccs;
@@ -1204,8 +1206,12 @@ static void xhci_set_ep_state(XHCIState *xhci, XHCIEPContext *epctx,
             xhci_dma_write_u32s(xhci, sctx->pctx, ctx2, sizeof(ctx2));
         }
     } else {
-        ctx[2] = epctx->ring.dequeue | epctx->ring.ccs;
-        ctx[3] = (epctx->ring.dequeue >> 16) >> 16;
+        ring = &epctx->ring;
+    }
+    if (ring) {
+        ctx[2] = ring->dequeue | ring->ccs;
+        ctx[3] = (ring->dequeue >> 16) >> 16;
+
         DPRINTF("xhci: set epctx: " DMA_ADDR_FMT " state=%d dequeue=%08x%08x\n",
                 epctx->pctx, state, ctx[3], ctx[2]);
     }