[PATCH xserver] xephyr: Don't crash if the server advertises zero xv adaptors

[Adam Jackson]

Useless as an XVideo implementation with zero adaptors might be, it's
apparently a thing in the wild. Catch this case and bail out of xv init
if it happens.

Signed-off-by: Adam Jackson <ajax at redhat.com>
---
 hw/kdrive/ephyr/ephyrvideo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/kdrive/ephyr/ephyrvideo.c b/hw/kdrive/ephyr/ephyrvideo.c
index 56a5ff1..31b1eee 100644
--- a/hw/kdrive/ephyr/ephyrvideo.c
+++ b/hw/kdrive/ephyr/ephyrvideo.c
@@ -462,7 +462,7 @@ ephyrXVPrivQueryHostAdaptors(EphyrXVPriv * a_this)
 
     if (a_this->host_adaptors)
         a_this->num_adaptors = a_this->host_adaptors->num_adaptors;
-    if (a_this->num_adaptors < 0) {
+    if (a_this->num_adaptors <= 0) {
         EPHYR_LOG_ERROR("failed to get number of host adaptors\n");
         goto out;
     }
-- 
2.7.4