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[Qemu-devel] [PATCH 1/2] ehci: Fix interrupts stopping when Interrupt Th
From: |
Hans de Goede |
Subject: |
[Qemu-devel] [PATCH 1/2] ehci: Fix interrupts stopping when Interrupt Threshold Control is 8 |
Date: |
Mon, 10 Sep 2012 12:44:10 +0200 |
If Interrupt Threshold Control is 8 or a multiple of 8, then
s->usbsts_frindex can become exactly 0x4000, at which point
(s->usbsts_frindex > s->frindex) will never become true, as
s->usbsts_frindex will not be lowered / reset in this case.
This patch fixes this.
Signed-off-by: Hans de Goede <address@hidden>
---
hw/usb/hcd-ehci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 30d2b56..e6d2062 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -2426,7 +2426,7 @@ static void ehci_update_frindex(EHCIState *ehci, int
frames)
if (ehci->frindex == 0x00004000) {
ehci_raise_irq(ehci, USBSTS_FLR);
ehci->frindex = 0;
- if (ehci->usbsts_frindex > 0x00004000) {
+ if (ehci->usbsts_frindex >= 0x00004000) {
ehci->usbsts_frindex -= 0x00004000;
} else {
ehci->usbsts_frindex = 0;
--
1.7.12