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[Qemu-devel] [PATCH 04/36] ehci: Set int flag on a short input packet
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PATCH 04/36] ehci: Set int flag on a short input packet |
Date: |
Thu, 25 Oct 2012 14:51:37 +0200 |
From: Hans de Goede <address@hidden>
According to 4.15.1.2 an interrupt must be raised when a short packet
is received. If we don't do this it may take a significant time for
the guest to notice a short trasnfer has completed, since only the last td
will have its IOC flag set, and a short transfer may complete in an earlier
packet.
Signed-off-by: Hans de Goede <address@hidden>
Signed-off-by: Gerd Hoffmann <address@hidden>
---
hw/usb/hcd-ehci.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 82f4dbd..8b4e3c8 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -1508,6 +1508,10 @@ static void ehci_execute_complete(EHCIQueue *q)
if (tbytes && p->pid == USB_TOKEN_IN) {
tbytes -= p->usb_status;
+ if (tbytes) {
+ /* 4.15.1.2 must raise int on a short input packet */
+ ehci_raise_irq(q->ehci, USBSTS_INT);
+ }
} else {
tbytes = 0;
}
--
1.7.1
- [Qemu-devel] [PATCH 25/36] uhci: Immediately free queues on device disconnect, (continued)
- [Qemu-devel] [PATCH 25/36] uhci: Immediately free queues on device disconnect, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 14/36] usb: Add an int_req flag to USBPacket, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 36/36] xhci: fix usb name in caps, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 23/36] uhci: Make uhci_fill_queue() actually operate on an UHCIQueue, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 05/36] ehci: Improve latency of interrupt delivery and async schedule scanning, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 24/36] uhci: Store ep in UHCIQueue, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 19/36] uhci: Drop unnecessary forward declaration of some static functions, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 26/36] uhci: Verify queue has not been changed by guest, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 09/36] xhci: Add a xhci_ep_nuke_one_xfer helper function, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 07/36] ehci: Detect going in circles when filling the queue, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 04/36] ehci: Set int flag on a short input packet,
Gerd Hoffmann <=
- [Qemu-devel] [PATCH 22/36] uhci: Add uhci_read_td() helper function, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 31/36] uhci: Use only one queue for ctrl endpoints, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 30/36] uhci: Retry to fill the queue while waiting for td completion, Gerd Hoffmann, 2012/10/25
- [Qemu-devel] [PATCH 35/36] xhci: make number of interrupters and slots configurable, Gerd Hoffmann, 2012/10/25
- Re: [Qemu-devel] [PULL 00/36] usb patch queue, Anthony Liguori, 2012/10/29