From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Fri, 2 Apr 2004 20:58:56 +0000 (+0000)
Subject: avoid rounding problems
X-Git-Tag: release_0_9_0-iwjtag~1699
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=1154e441aa19ce3bf15fb0cabab2a5656321b43f;p=qemu-xen-4.4-testing.git

avoid rounding problems


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@696 c046a42c-6fe2-441c-8c8c-71466251a162
---

diff --git a/hw/i8254.c b/hw/i8254.c
index 20cca0ef8..ad61a14af 100644
--- a/hw/i8254.c
+++ b/hw/i8254.c
@@ -136,6 +136,10 @@ static int64_t pit_get_next_transition_time(PITChannelState *s,
     }
     /* convert to timer units */
     next_time = s->count_load_time + muldiv64(next_time, ticks_per_sec, PIT_FREQ);
+    /* fix potential rounding problems */
+    /* XXX: better solution: use a clock at PIT_FREQ Hz */
+    if (next_time <= current_time)
+        next_time = current_time + 1;
     return next_time;
 }