pvcalls-front: don't return error when the ring is full
When the ring is full, size == array_size. It is not an error condition,
so simply return 0 instead of an error.
Signed-off-by: Stefano Stabellini <stefanos@xilinx.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index 0158858..1a893a1 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -475,8 +475,10 @@
virt_mb();
size = pvcalls_queued(prod, cons, array_size);
- if (size >= array_size)
+ if (size > array_size)
return -EINVAL;
+ if (size == array_size)
+ return 0;
if (len > array_size - size)
len = array_size - size;