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[Qemu-devel] [PATCH RFC 1/3] dataplane: print why starting failed
From: |
Cornelia Huck |
Subject: |
[Qemu-devel] [PATCH RFC 1/3] dataplane: print why starting failed |
Date: |
Fri, 25 Jul 2014 14:10:46 +0200 |
Setting up guest or host notifiers may fail, but the user will have
no idea why: Let's print the error returned by the callback.
Acked-by: Christian Borntraeger <address@hidden>
Signed-off-by: Cornelia Huck <address@hidden>
---
hw/block/dataplane/virtio-blk.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c
index d6ba65c..527a53c 100644
--- a/hw/block/dataplane/virtio-blk.c
+++ b/hw/block/dataplane/virtio-blk.c
@@ -218,6 +218,7 @@ void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s)
VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
VirtIOBlock *vblk = VIRTIO_BLK(s->vdev);
VirtQueue *vq;
+ int r;
if (s->started) {
return;
@@ -236,16 +237,18 @@ void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s)
}
/* Set up guest notifier (irq) */
- if (k->set_guest_notifiers(qbus->parent, 1, true) != 0) {
- fprintf(stderr, "virtio-blk failed to set guest notifier, "
- "ensure -enable-kvm is set\n");
+ r = k->set_guest_notifiers(qbus->parent, 1, true);
+ if (r != 0) {
+ fprintf(stderr, "virtio-blk failed to set guest notifier (%d), "
+ "ensure -enable-kvm is set\n", r);
exit(1);
}
s->guest_notifier = virtio_queue_get_guest_notifier(vq);
/* Set up virtqueue notify */
- if (k->set_host_notifier(qbus->parent, 0, true) != 0) {
- fprintf(stderr, "virtio-blk failed to set host notifier\n");
+ r = k->set_host_notifier(qbus->parent, 0, true);
+ if (r != 0) {
+ fprintf(stderr, "virtio-blk failed to set host notifier (%d)\n", r);
exit(1);
}
s->host_notifier = *virtio_queue_get_host_notifier(vq);
--
1.7.9.5