[Qemu-devel] [PATCH v2 4/5] disallow kqemu if we fail to load it.

[Glauber Costa <glommer@redhat.com>]

Since we're not retrying it anyway, set kqemu_allowed = 0
if we fail to load it. It will allow us to test for kqemu
runtime presence where we don't have an env pointer, possibly
because we don't have a cpu yet.

The monitor code is such an example.

Signed-off-by: Glauber Costa <glommer@redhat.com>
---
 kqemu.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/kqemu.c b/kqemu.c
index 040e817..e0e0499 100644
--- a/kqemu.c
+++ b/kqemu.c
@@ -179,14 +179,14 @@ int kqemu_init(CPUState *env)
     if (kqemu_fd == KQEMU_INVALID_FD) {
         fprintf(stderr, "Could not open '%s' - QEMU acceleration layer not activated: %lu\n",
                 KQEMU_DEVICE, GetLastError());
-        return -1;
+        goto out;
     }
 #else
     kqemu_fd = open(KQEMU_DEVICE, O_RDWR);
     if (kqemu_fd == KQEMU_INVALID_FD) {
         fprintf(stderr, "Could not open '%s' - QEMU acceleration layer not activated: %s\n",
                 KQEMU_DEVICE, strerror(errno));
-        return -1;
+        goto out;
     }
 #endif
     version = 0;
@@ -239,6 +239,8 @@ int kqemu_init(CPUState *env)
     fail:
         kqemu_closefd(kqemu_fd);
         kqemu_fd = KQEMU_INVALID_FD;
+    out:
+        kqemu_allowed = 0;
         return -1;
     }
     kqemu_update_cpuid(env);
-- 
1.5.6.6