diff options
Diffstat (limited to 'tools/ocaml/libs/xb/xs_ring_stubs.c')
| -rw-r--r-- | tools/ocaml/libs/xb/xs_ring_stubs.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/ocaml/libs/xb/xs_ring_stubs.c b/tools/ocaml/libs/xb/xs_ring_stubs.c index 4888ac5631..fdd9983d1a 100644 --- a/tools/ocaml/libs/xb/xs_ring_stubs.c +++ b/tools/ocaml/libs/xb/xs_ring_stubs.c @@ -45,10 +45,10 @@ static int xs_ring_read(struct mmap_interface *interface, cons = *(volatile uint32*)&intf->req_cons; prod = *(volatile uint32*)&intf->req_prod; xen_mb(); - cons = MASK_XENSTORE_IDX(cons); - prod = MASK_XENSTORE_IDX(prod); if (prod == cons) return 0; + cons = MASK_XENSTORE_IDX(cons); + prod = MASK_XENSTORE_IDX(prod); if (prod > cons) to_read = prod - cons; else |