[PATCH v2] xen/arm: irq: add missing spin_unlock() in init_local_irq_data() error path

[Mykola Kvach <xakep.amatop@xxxxxxxxx>]

From: Mykola Kvach <mykola_kvach@xxxxxxxx>

If init_one_irq_desc() fails, init_local_irq_data() returns without
releasing local_irqs_type_lock, leading to a possible deadlock.

Release the lock before returning to ensure proper cleanup.

Fixes: 2bb32b809250 ("xen/irq: Propagate the error from init_one_desc_irq() in 
init_*_irq_data()")
Signed-off-by: Mykola Kvach <mykola_kvach@xxxxxxxx>
Reviewed-by: Denis Mukhin <dmukhin@xxxxxxxx>
---
 xen/arch/arm/irq.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/arch/arm/irq.c b/xen/arch/arm/irq.c
index 4bbf0b0664..02ca82c089 100644
--- a/xen/arch/arm/irq.c
+++ b/xen/arch/arm/irq.c
@@ -94,7 +94,10 @@ static int init_local_irq_data(unsigned int cpu)
         int rc = init_one_irq_desc(desc);
 
         if ( rc )
+        {
+            spin_unlock(&local_irqs_type_lock);
             return rc;
+        }
 
         desc->irq = irq;
         desc->action  = NULL;
-- 
2.48.1