Commit 4ec1b010 authored Aug 01, 2014 by Sowmini Varadhan Committed by David S. Miller Aug 04, 2014

sparc64: ldc_connect() should not return EINVAL when handshake is in progress.



The LDC handshake could have been asynchronously triggered
after ldc_bind() enables the ldc_rx() receive interrupt-handler
(and thus intercepts incoming control packets)
and before vio_port_up() calls ldc_connect(). If that is the case,
ldc_connect() should return 0 and let the state-machine
progress.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Karl Volz <karl.volz@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 4ca9a237

arch/sparc/kernel/ldc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1336,7 +1336,7 @@ int ldc_connect(struct ldc_channel *lp)
		if (!(lp->flags & LDC_FLAG_ALLOCED_QUEUES) \|\|
		!(lp->flags & LDC_FLAG_REGISTERED_QUEUES) \|\|
		lp->hs_state != LDC_HS_OPEN)
		err = -EINVAL;
		err = ((lp->hs_state > LDC_HS_OPEN) ? 0 : -EINVAL);
		else
		err = start_handshake(lp);