ehci: fix overflow in frame timer code
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 <8610_28@163.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20170515104543.32044-1-kraxel@redhat.com
This commit is contained in:
parent
9964e96dc9
commit
3ae7eb88c4
|
@ -2238,7 +2238,7 @@ static void ehci_frame_timer(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);
|
||||
|
|
Loading…
Reference in a new issue