[PATCH 4/5] feedback: disable interrupts in example code

["Michael S. Tsirkin" <mst@redhat.com>]

example code does not have to be optimal but it
seems cleaner to disable interrupts after we
recheck the ring empty state.

Cc: Arun Subbarao <asubbarao@lnxw.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 content.tex | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/content.tex b/content.tex
index e6c6a3f..365df87 100644
--- a/content.tex
+++ b/content.tex
@@ -755,6 +755,8 @@ suppressed by the device:
 
 			if (vq->last_seen_used != le16_to_cpu(vring->used.idx))
 				break;
+
+			vring_disable_interrupts(vq);
 		}
 
 		struct vring_used_elem *e = vring.used->ring[vq->last_seen_used%vsz];
-- 
MST