[Xen-devel] [PATCH 01/31] [xen-core] Provide a variant of xen_poll_irq with timeout.

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

The 'xen_poll_irq_timeout' provides a method to pass in
the poll timeout for IRQs if requested.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 drivers/xen/events.c |   12 +++++++++---
 include/xen/events.h |    4 ++++
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 41772d5..e9f7551 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -1302,9 +1302,9 @@ bool xen_test_irq_pending(int irq)
        return ret;
 }
 
-/* Poll waiting for an irq to become pending.  In the usual case, the
+/* Poll waiting for an irq to become pending with timeout.  In the usual case, 
the
    irq will be disabled so it won't deliver an interrupt. */
-void xen_poll_irq(int irq)
+void xen_poll_irq_timeout(int irq, u64 timeout)
 {
        evtchn_port_t evtchn = evtchn_from_irq(irq);
 
@@ -1312,13 +1312,19 @@ void xen_poll_irq(int irq)
                struct sched_poll poll;
 
                poll.nr_ports = 1;
-               poll.timeout = 0;
+               poll.timeout = timeout;
                set_xen_guest_handle(poll.ports, &evtchn);
 
                if (HYPERVISOR_sched_op(SCHEDOP_poll, &poll) != 0)
                        BUG();
        }
 }
+/* Poll waiting for an irq to become pending.  In the usual case, the
+   irq will be disabled so it won't deliver an interrupt. */
+void xen_poll_irq(int irq)
+{
+       xen_poll_irq_timeout(irq, 0 /* no timeout */);
+}
 
 void xen_irq_resume(void)
 {
diff --git a/include/xen/events.h b/include/xen/events.h
index bb654f2..ba02c54 100644
--- a/include/xen/events.h
+++ b/include/xen/events.h
@@ -62,6 +62,10 @@ bool xen_test_irq_pending(int irq);
    irq will be disabled so it won't deliver an interrupt. */
 void xen_poll_irq(int irq);
 
+/* Poll waiting for an irq to become pending with a timeout.  In the usual 
case, the
+   irq will be disabled so it won't deliver an interrupt. */
+void xen_poll_irq_timeout(int irq, u64 timeout);
+
 /* Determine the IRQ which is bound to an event channel */
 unsigned irq_from_evtchn(unsigned int evtchn);
 
-- 
1.6.2.5


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