diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2012-10-24 18:31:15 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2012-10-25 09:08:11 +0200 |
| commit | 66a08cbe6ad1aebec8eecf58b3ba042e19dd1649 (patch) | |
| tree | e0ca4155acb07af3a07ac07b58c8d142d1a77f5e /trace-events | |
| parent | 5ad23e873c858292dc58b9296261365312b8f683 (diff) | |
uhci: Verify queue has not been changed by guest
According to the spec a guest can unlink a qh, and then as soon as frindex
has changed by 1 since the unlink, assume it is idle and re-use it. However
for various reasons, we cannot simply consider a qh as unlinked if we've not
seen it for 1 frame. This means that it is possible for a guest to re-use /
restart the queue while we still see its old state. This patch adds a safety
check for this, and "early" retires queues when they were changed by the guest.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'trace-events')
| -rw-r--r-- | trace-events | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/trace-events b/trace-events index e2d4580d4c..ed136a56a1 100644 --- a/trace-events +++ b/trace-events @@ -287,7 +287,7 @@ usb_uhci_mmio_writew(uint32_t addr, uint32_t val) "addr 0x%04x, val 0x%04x" usb_uhci_mmio_readl(uint32_t addr, uint32_t val) "addr 0x%04x, ret 0x%08x" usb_uhci_mmio_writel(uint32_t addr, uint32_t val) "addr 0x%04x, val 0x%08x" usb_uhci_queue_add(uint32_t token) "token 0x%x" -usb_uhci_queue_del(uint32_t token) "token 0x%x" +usb_uhci_queue_del(uint32_t token, const char *reason) "token 0x%x: %s" usb_uhci_packet_add(uint32_t token, uint32_t addr) "token 0x%x, td 0x%x" usb_uhci_packet_link_async(uint32_t token, uint32_t addr) "token 0x%x, td 0x%x" usb_uhci_packet_unlink_async(uint32_t token, uint32_t addr) "token 0x%x, td 0x%x" |