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[Qemu-devel] [PATCH 2/7] xhci: Fix number of streams allocated when usin


From: Gerd Hoffmann
Subject: [Qemu-devel] [PATCH 2/7] xhci: Fix number of streams allocated when using streams
Date: Thu, 19 Sep 2013 11:34:53 +0200

From: Hans de Goede <address@hidden>

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 <address@hidden>
Signed-off-by: Gerd Hoffmann <address@hidden>
---
 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




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