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| author | Gerd Hoffmann <kraxel@redhat.com> | 2017-03-31 12:25:21 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2017-04-03 11:40:57 +0200 |
| commit | 243afe858b95765b98d16a1f0dd50dca262858ad (patch) | |
| tree | efb1b769c0e577509c2a00ec99755dfa3f362aa2 /hw/usb/hcd-xhci.c | |
| parent | 95b31d709ba343ad237c3630047ee7438bac4065 (diff) | |
| download | qemu-243afe858b95765b98d16a1f0dd50dca262858ad.zip qemu-243afe858b95765b98d16a1f0dd50dca262858ad.tar.gz qemu-243afe858b95765b98d16a1f0dd50dca262858ad.tar.bz2 | |
xhci: flush dequeue pointer to endpoint context
When done processing a endpoint ring we must update the dequeue pointer
in the endpoint context in guest memory. This is needed to make sure
the guest has a correct view of things and also to make live migration
work properly, because xhci post_load restores alot of the state from
xhci data structures in guest memory.
Add xhci_set_ep_state() call to do that.
The recursive calls stopped by commit
ddb603ab6c981c1d67cb42266fc700c33e5b2d8f had the (unintentional) side
effect to hiding this bug. xhci_set_ep_state() was called before
processing, to set the state to running, which updated the dequeue
pointer too.
Reported-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-id: 20170331102521.29253-1-kraxel@redhat.com
Diffstat (limited to 'hw/usb/hcd-xhci.c')
| -rw-r--r-- | hw/usb/hcd-xhci.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index f0af852..a2d3143 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -2063,7 +2063,7 @@ static void xhci_kick_ep(XHCIState *xhci, unsigned int slotid, static void xhci_kick_epctx(XHCIEPContext *epctx, unsigned int streamid) { XHCIState *xhci = epctx->xhci; - XHCIStreamContext *stctx; + XHCIStreamContext *stctx = NULL; XHCITransfer *xfer; XHCIRing *ring; USBEndpoint *ep = NULL; @@ -2186,6 +2186,8 @@ static void xhci_kick_epctx(XHCIEPContext *epctx, unsigned int streamid) break; } } + /* update ring dequeue ptr */ + xhci_set_ep_state(xhci, epctx, stctx, epctx->state); epctx->kick_active--; ep = xhci_epid_to_usbep(epctx); |