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usb-redir: allocate buffers before waking up the host adapter

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Needed to make sure usb redirection is prepared to actually handle the
callback from the usb host adapter.  Without this interrupt endpoints
don't work on xhci.

Note: On ehci the usb_wakeup() call only schedules a BH for the actual
work, which hides this bug because the allocation happens before ehci
calls back even without this patch.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Message-id: 1476096313-7730-1-git-send-email-kraxel@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Hans de Goede 2016-10-10 12:45:13 +02:00 committed by Gerd Hoffmann
parent 6998b6c7c7
commit d5c42857d6
1 changed files with 7 additions and 3 deletions
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10
hw/usb/redirect.c
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@ -2036,18 +2036,22 @@ static void usbredir_interrupt_packet(void *priv, uint64_t id,
}
if (ep & USB_DIR_IN) {
bool q_was_empty;
if (dev->endpoint[EP2I(ep)].interrupt_started == 0) {
DPRINTF("received int packet while not started ep %02X\n", ep);
free(data);
return;
}
if (QTAILQ_EMPTY(&dev->endpoint[EP2I(ep)].bufpq)) {
usb_wakeup(usb_ep_get(&dev->dev, USB_TOKEN_IN, ep & 0x0f), 0);
}
q_was_empty = QTAILQ_EMPTY(&dev->endpoint[EP2I(ep)].bufpq);
/* bufp_alloc also adds the packet to the ep queue */
bufp_alloc(dev, data, data_len, interrupt_packet->status, ep, data);
if (q_was_empty) {
usb_wakeup(usb_ep_get(&dev->dev, USB_TOKEN_IN, ep & 0x0f), 0);
}
} else {
/*
* We report output interrupt packets as completed directly upon