MIPS/ralink: Fix race in installing chained IRQ handler

Author: Thomas Gleixner <tglx@linutronix.de>

Fix a race where a pending interrupt could be received and the handler
called before the handler's data has been setup, by converting to
irq_set_chained_handler_and_data().

Search and conversion was done with coccinelle:

@@
expression E1, E2, E3;
@@
(
-if (irq_set_chained_handler(E1, E3) != 0)
-   BUG();
|
-irq_set_chained_handler(E1, E3);
)
-irq_set_handler_data(E1, E2);
+irq_set_chained_handler_and_data(E1, E3, E2);

@@
expression E1, E2, E3;
@@
(
-if (irq_set_chained_handler(E1, E3) != 0)
-   BUG();
...
|
-irq_set_chained_handler(E1, E3);
...
)
-irq_set_handler_data(E1, E2);
+irq_set_chained_handler_and_data(E1, E3, E2);

Reported-by: Russell King 
Signed-off-by: Thomas Gleixner 
Cc: Julia Lawall 
Cc: Ralf Baechle 
Cc: Qais Yousef 
Cc: Andrew Bresticker 
Cc: John Crispin 
Cc: linux-mips@linux-mips.org

---
 arch/mips/ralink/irq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
 
diff --git a/arch/mips/ralink/irq.c b/arch/mips/ralink/irq.c
index 7cf91b9..f044299 100644
--- a/arch/mips/ralink/irq.c
+++ b/arch/mips/ralink/irq.c
@@ -184,8 +184,7 @@ static int __init intc_of_init(struct device_node *node,
 
 	rt_intc_w32(INTC_INT_GLOBAL, INTC_REG_ENABLE);
 
-	irq_set_chained_handler(irq, ralink_intc_irq_handler);
-	irq_set_handler_data(irq, domain);
+	irq_set_chained_handler_and_data(irq, ralink_intc_irq_handler, domain);
 
 	/* tell the kernel which irq is used for performance monitoring */
 	rt_perfcount_irq = irq_create_mapping(domain, 9);