xen: clear IRQ_NOAUTOEN and IRQ_NOREQUEST

Reset the IRQ_NOAUTOEN and IRQ_NOREQUEST flags that are enabled by
default on ARM. If IRQ_NOAUTOEN is set, __setup_irq doesn't call
irq_startup, that is responsible for calling irq_unmask at startup time.
As a result event channels remain masked.

The clear is already made in bind_evtchn_to_irq with commit a8636c0 but was
missing on all others bind_*_to_irq. Move the clear in xen_irq_info_common_init.

On x86, IRQ_NOAUTOEN and IRQ_NOREQUEST are cleared by default, so this commit
doesn't impact this architecture.

Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 94daed14d474..b6c4f1a6d1e2 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -167,6 +167,8 @@ static void xen_irq_info_common_init(struct irq_info *info,
         info->cpu = cpu;
 
         evtchn_to_irq[evtchn] = irq;
+
+        irq_clear_status_flags(irq, IRQ_NOREQUEST|IRQ_NOAUTOEN);
 }
 
 static void xen_irq_info_evtchn_init(unsigned irq,
@@ -874,7 +876,6 @@ int bind_evtchn_to_irq(unsigned int evtchn)
                 struct irq_info *info = info_for_irq(irq);
                 WARN_ON(info == NULL || info->type != IRQT_EVTCHN);
         }
-        irq_clear_status_flags(irq, IRQ_NOREQUEST|IRQ_NOAUTOEN);
 
 out:
         mutex_unlock(&irq_mapping_update_lock);