From: Brad Smith <brad@comstyle.com>
Date: Fri, 28 Dec 2012 06:00:26 +0000 (-0500)
Subject: Fix semaphores fallback code
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a795ef8dcb8cbadffc996c41ff38927a97645234;p=qemu.git

Fix semaphores fallback code

As reported in bug 1087114 the semaphores fallback code is broken which
results in QEMU crashing and making QEMU unusable.

This patch is from Paolo.

This needs to be back ported to the 1.3 stable tree as well.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Brad Smith <brad@comstyle.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
---

diff --git a/qemu-thread-posix.c b/qemu-thread-posix.c
index 6374df3328..4489abf1d8 100644
--- a/qemu-thread-posix.c
+++ b/qemu-thread-posix.c
@@ -213,6 +213,7 @@ int qemu_sem_timedwait(QemuSemaphore *sem, int ms)
     while (sem->count < 0) {
         rc = pthread_cond_timedwait(&sem->cond, &sem->lock, &ts);
         if (rc == ETIMEDOUT) {
+            ++sem->count;
             break;
         }
         if (rc != 0) {