diff mbox

[RFC,v3,09/10] Always use eventfd as notifying mechanism

Message ID 1401695374-4287-10-git-send-email-eric.auger@linaro.org
State New
Headers show

Commit Message

Auger Eric June 2, 2014, 7:49 a.m. UTC 
From: Alvise Rigo <a.rigo@virtualopensystems.com>

When eventfd is not configured the method event_notifier_init fallbacks
to the pipe/pipe2 system call, causing an error in VFIO_DEVICE_SET_IRQS
since we pass to the kernel a file descriptor which is not created by
eventfd.

Signed-off-by: Alvise Rigo <a.rigo@virtualopensystems.com>
---
 hw/vfio/platform.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox

Patch

diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c
index 377783b..56dde5f 100644
--- a/hw/vfio/platform.c
+++ b/hw/vfio/platform.c
@@ -346,6 +346,11 @@  static int vfio_enable_intp(VFIODevice *vdev, unsigned int index)
     sysbus_init_irq(sbdev, &intp->qemuirq);
 
     ret = event_notifier_init(&intp->interrupt, 0);
+    if (!ret && (intp->interrupt.rfd != intp->interrupt.wfd)) {
+        /* event_notifier_init created a pipe instead of eventfd */
+        ret = -1;
+    }
+
     if (ret) {
         error_report("vfio: Error: event_notifier_init failed ");
         return ret;