[PATCH] powerpc/powernv: Increase opal-irqchip initcall priority

[Alistair Popple]

The eeh subsystem for powernv requires the opal event irqchip to be
initialised prior to initialisation or the following errors are
produced (and eeh doesn't work as expected):

irq: XICS didn't like hwirq-0x9 to VIRQ17 mapping (rc=-22)
pnv_eeh_post_init: Can't request OPAL event interrupt (0)

On powernv eeh is initialised from a subsys_initcall due to a check
for machine_is(powernv) in eeh_init(). This patch increases the
initcall priority of opal_event_init() to an arch_initcall to ensure
the opal event interface is initialised prior to any users of it.

Signed-off-by: Alistair Popple <alistair at popple.id.au>
Reported-by: Daniel Axtens <dja at axtens.net>
---

Michael,

This supercedes my previous patch (powerpc/powernv: Bump opal_init
initcall priority).

Thanks.

 arch/powerpc/platforms/powernv/opal-irqchip.c | 4 ++++
 arch/powerpc/platforms/powernv/opal.c         | 3 ---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/opal-irqchip.c b/arch/powerpc/platforms/powernv/opal-irqchip.c
index 841135f..e2e7d75 100644
--- a/arch/powerpc/platforms/powernv/opal-irqchip.c
+++ b/arch/powerpc/platforms/powernv/opal-irqchip.c
@@ -231,6 +231,7 @@ out:
 	of_node_put(opal_node);
 	return rc;
 }
+machine_arch_initcall(powernv, opal_event_init);

 /**
  * opal_event_request(unsigned int opal_event_nr) - Request an event
@@ -244,6 +245,9 @@ out:
  */
 int opal_event_request(unsigned int opal_event_nr)
 {
+	if (WARN_ON_ONCE(!opal_event_irqchip.domain))
+		return NO_IRQ;
+
 	return irq_create_mapping(opal_event_irqchip.domain, opal_event_nr);
 }
 EXPORT_SYMBOL(opal_event_request);
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 9e9c483..f084afa 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -657,9 +657,6 @@ static int __init opal_init(void)
 		return -ENODEV;
 	}

-	/* Initialise OPAL events */
-	opal_event_init();
-
 	/* Register OPAL consoles if any ports */
 	if (firmware_has_feature(FW_FEATURE_OPALv2))
 		consoles = of_find_node_by_path("/ibm,opal/consoles");
--
1.8.3.2