ARM: SAMSUNG: Check NULL return from irq_alloc_generic_chip

Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/plat-samsung/irq-uart.c

@@ -54,6 +54,13 @@ static void __init s3c_init_uart_irq(struct s3c_uart_irq *uirq)
 
 	gc = irq_alloc_generic_chip("s3c-uart", 1, uirq->base_irq, reg_base,
 				    handle_level_irq);
+
+	if (!gc) {
+		pr_err("%s: irq_alloc_generic_chip for IRQ %u failed\n",
+		       __func__, uirq->base_irq);
+		return;
+	}
+
 	ct = gc->chip_types;
 	ct->chip.irq_ack = irq_gc_ack;
 	ct->chip.irq_mask = irq_gc_mask_set_bit;

arch/arm/plat-samsung/irq-vic-timer.c

@@ -54,6 +54,13 @@ void __init s3c_init_vic_timer_irq(unsigned int num, unsigned int timer_irq)
 
 	s3c_tgc = irq_alloc_generic_chip("s3c-timer", 1, timer_irq,
 					 S3C64XX_TINT_CSTAT, handle_level_irq);
+
+	if (!s3c_tgc) {
+		pr_err("%s: irq_alloc_generic_chip for IRQ %d failed\n",
+		       __func__, timer_irq);
+		return;
+	}
+
 	ct = s3c_tgc->chip_types;
 	ct->chip.irq_mask = irq_gc_mask_clr_bit;
 	ct->chip.irq_unmask = irq_gc_mask_set_bit;