diff options
| author | Stefano Stabellini <sstabellini@kernel.org> | 2018-12-21 15:06:32 -0800 |
|---|---|---|
| committer | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2019-01-02 11:00:31 -0500 |
| commit | d90a1ca60a1eccb4383fe203c76223ab4c0799ed (patch) | |
| tree | a4b61eaf0953ed2005a0ccb3a00d025b2addee56 /drivers/xen/pvcalls-front.c | |
| parent | beee1fbe8f7d57d6ebaa5188f9f4db89c2077196 (diff) | |
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>
Diffstat (limited to 'drivers/xen/pvcalls-front.c')
| -rw-r--r-- | drivers/xen/pvcalls-front.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c index 01588582ae66..1a893a164349 100644 --- a/drivers/xen/pvcalls-front.c +++ b/drivers/xen/pvcalls-front.c @@ -475,8 +475,10 @@ static int __write_ring(struct pvcalls_data_intf *intf, 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; |