[PATCH] arm/its: enable LPIs before mapping the collection table

[Rahul Singh <rahul.singh@xxxxxxx>]

MAPC_LPI_OFF ITS command error can be reported to software if LPIs are
not enabled before mapping the collection table using MAPC command.

Enable the LPIs using GICR_CTLR.EnableLPIs before mapping the collection
table.

Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
---
 xen/arch/arm/gic-v3.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c
index 3c472ed768..8fb0014b16 100644
--- a/xen/arch/arm/gic-v3.c
+++ b/xen/arch/arm/gic-v3.c
@@ -812,11 +812,11 @@ static int gicv3_cpu_init(void)
     /* If the host has any ITSes, enable LPIs now. */
     if ( gicv3_its_host_has_its() )
     {
+        if ( !gicv3_enable_lpis() )
+            return -EBUSY;
         ret = gicv3_its_setup_collection(smp_processor_id());
         if ( ret )
             return ret;
-        if ( !gicv3_enable_lpis() )
-            return -EBUSY;
     }
 
     /* Set priority on PPI and SGI interrupts */
-- 
2.25.1