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From 90905dca56de07f7c394ef8cbe480a0d08e0d8cd Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Mon, 3 Sep 2012 11:35:58 +0200
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Subject: [PATCH] ehci: Handle USB_RET_PROCERR in ehci_fill_queue
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USB_RET_PROCERR can be triggered by the guest (by for example requesting more
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then BUFFSIZE bytes), so don't assert on it.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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(cherry picked from commit eff6dce79bd7ad3c16d75c5e55b5a2a137ba6a60)
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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hw/usb/hcd-ehci.c | 9 ++++++---
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1 file changed, 6 insertions(+), 3 deletions(-)
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diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
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index d87aca8..2534394 100644
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--- a/hw/usb/hcd-ehci.c
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+++ b/hw/usb/hcd-ehci.c
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@@ -2076,7 +2076,7 @@ static int ehci_state_horizqh(EHCIQueue *q)
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return again;
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}
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-static void ehci_fill_queue(EHCIPacket *p)
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+static int ehci_fill_queue(EHCIPacket *p)
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{
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EHCIQueue *q = p->queue;
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EHCIqtd qtd = p->qtd;
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@@ -2100,9 +2100,13 @@ static void ehci_fill_queue(EHCIPacket *p)
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p->qtdaddr = qtdaddr;
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p->qtd = qtd;
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p->usb_status = ehci_execute(p, "queue");
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+ if (p->usb_status == USB_RET_PROCERR) {
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+ break;
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+ }
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assert(p->usb_status == USB_RET_ASYNC);
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p->async = EHCI_ASYNC_INFLIGHT;
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}
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+ return p->usb_status;
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}
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static int ehci_state_execute(EHCIQueue *q)
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@@ -2144,8 +2148,7 @@ static int ehci_state_execute(EHCIQueue *q)
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trace_usb_ehci_packet_action(p->queue, p, "async");
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p->async = EHCI_ASYNC_INFLIGHT;
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ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
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- again = 1;
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- ehci_fill_queue(p);
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+ again = (ehci_fill_queue(p) == USB_RET_PROCERR) ? -1 : 1;
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goto out;
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}
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--
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1.7.12.1
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