38 lines
1.5 KiB
Diff
38 lines
1.5 KiB
Diff
From c6e419cb392d9e1cca5de66da2be7cb53277bf85 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Wed, 14 Nov 2012 16:21:36 +0000
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Subject: [PATCH] ehci: Don't access packet after freeing it
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ehci_state_writeback() will free the packet, so we should not access
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the packet after calling ehci_state_writeback().
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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 30d68cf6e156b97fc462e18f38ce83f44702cd7f)
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---
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hw/usb/hcd-ehci.c | 9 +++++----
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1 file changed, 5 insertions(+), 4 deletions(-)
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diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
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index 46f6d99..4229061 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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@@ -752,12 +752,13 @@ static EHCIPacket *ehci_alloc_packet(EHCIQueue *q)
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static void ehci_free_packet(EHCIPacket *p)
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{
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if (p->async == EHCI_ASYNC_FINISHED) {
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- int state = ehci_get_state(p->queue->ehci, p->queue->async);
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+ EHCIQueue *q = p->queue;
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+ int state = ehci_get_state(q->ehci, q->async);
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/* This is a normal, but rare condition (cancel racing completion) */
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fprintf(stderr, "EHCI: Warning packet completed but not processed\n");
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- ehci_state_executing(p->queue);
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- ehci_state_writeback(p->queue);
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- ehci_set_state(p->queue->ehci, p->queue->async, state);
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+ ehci_state_executing(q);
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+ ehci_state_writeback(q);
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+ ehci_set_state(q->ehci, q->async, state);
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/* state_writeback recurses into us with async == EHCI_ASYNC_NONE!! */
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return;
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}
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