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[Qemu-devel] [PATCH] ehci: fix overflow in frame timer code
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PATCH] ehci: fix overflow in frame timer code |
Date: |
Mon, 15 May 2017 12:45:43 +0200 |
In case the frame timer doesn't run for a while due to the host being
busy skipped_uframes can become big enough that UFRAME_TIMER_NS *
skipped_uframes overflows. Which in turn throws off all subsequent
ehci frame timer calculations.
Reported-by: 李林 <address@hidden>
Signed-off-by: Gerd Hoffmann <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 3703a8dddc..17c572c55f 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -2238,7 +2238,7 @@ static void ehci_work_bh(void *opaque)
int need_timer = 0;
int64_t expire_time, t_now;
uint64_t ns_elapsed;
- int uframes, skipped_uframes;
+ uint64_t uframes, skipped_uframes;
int i;
t_now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
--
2.9.3
- [Qemu-devel] [PATCH] ehci: fix overflow in frame timer code,
Gerd Hoffmann <=