[01/26] ehci: Add a ehci_writeback_async_complete_packet helper function

Submitted by Hans de Goede on Dec. 14, 2012, 1:35 p.m.

Details

Message ID 1355492147-5023-2-git-send-email-hdegoede@redhat.com
State New
Headers show

Commit Message

Hans de Goede Dec. 14, 2012, 1:35 p.m.
Also drop the warning printf, which was there mainly because this was an
untested code path (as the previous bug fixes to it show), but that no
longer is the case now :)

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 hw/usb/hcd-ehci.c | 28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)

Patch hide | download patch | download mbox

diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 7536837..218b1d7 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -438,6 +438,22 @@  static inline bool ehci_periodic_enabled(EHCIState *s)
     return ehci_enabled(s) && (s->usbcmd & USBCMD_PSE);
 }
 
+/* Finish executing and writeback a packet outside of the regular
+   fetchqh -> fetchqtd -> execute -> writeback cycle */
+static void ehci_writeback_async_complete_packet(EHCIPacket *p)
+{
+    EHCIQueue *q = p->queue;
+    int state;
+
+    state = ehci_get_state(q->ehci, q->async);
+    ehci_state_executing(q);
+    ehci_state_writeback(q); /* Frees the packet! */
+    if (!(q->qh.token & QTD_TOKEN_HALT)) {
+        ehci_state_advqueue(q);
+    }
+    ehci_set_state(q->ehci, q->async, state);
+}
+
 /* packet management */
 
 static EHCIPacket *ehci_alloc_packet(EHCIQueue *q)
@@ -455,17 +471,7 @@  static EHCIPacket *ehci_alloc_packet(EHCIQueue *q)
 static void ehci_free_packet(EHCIPacket *p)
 {
     if (p->async == EHCI_ASYNC_FINISHED) {
-        EHCIQueue *q = p->queue;
-        int state = ehci_get_state(q->ehci, q->async);
-        /* This is a normal, but rare condition (cancel racing completion) */
-        fprintf(stderr, "EHCI: Warning packet completed but not processed\n");
-        ehci_state_executing(q);
-        ehci_state_writeback(q);
-        if (!(q->qh.token & QTD_TOKEN_HALT)) {
-            ehci_state_advqueue(q);
-        }
-        ehci_set_state(q->ehci, q->async, state);
-        /* state_writeback recurses into us with async == EHCI_ASYNC_NONE!! */
+        ehci_writeback_async_complete_packet(p);
         return;
     }
     trace_usb_ehci_packet_action(p->queue, p, "free");