Commit b79470b6 authored Dec 21, 2018 by Stefano Stabellini Committed by Boris Ostrovsky Jan 02, 2019

pvcalls-front: read all data before closing the connection



When a connection is closing in_error is set to ENOTCONN. There could
still be outstanding data on the ring left by the backend. Before
closing the connection on the frontend side, drain the ring.

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>

parent 58f9d806

drivers/xen/pvcalls-front.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -560,15 +560,13 @@ static int __read_ring(struct pvcalls_data_intf *intf,
		error = intf->in_error;
		/* get pointers before reading from the ring */
		virt_rmb();
		if (error < 0)
		return error;

		size = pvcalls_queued(prod, cons, array_size);
		masked_prod = pvcalls_mask(prod, array_size);
		masked_cons = pvcalls_mask(cons, array_size);

		if (size == 0)
		return 0;
		return error ?: size;

		if (len > size)
		len = size;

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