Commit 36a2e9bf authored Dec 21, 2018 by Stefano Stabellini Committed by Greg Kroah-Hartman Dec 17, 2019

pvcalls-front: don't return error when the ring is full



[ Upstream commit d90a1ca60a1eccb4383fe203c76223ab4c0799ed ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 1fb59428

drivers/xen/pvcalls-front.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -504,8 +504,10 @@ 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;