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xhci: Fix number of streams allocated when using streams

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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 <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Hans de Goede 2013-09-16 17:04:27 +02:00 committed by Gerd Hoffmann
parent b5613fdcb0
commit d063c3112c
1 changed files with 1 additions and 1 deletions
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2
hw/usb/hcd-xhci.c
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@ -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);
}