irq_data_get_irq_chip() can return NULL, however it is expected that this
never happens. If a buggy driver leads to NULL being returned from
irq_data_get_irq_chip(), warn about it instead of crashing the machine.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
To: linux-arm-kernel@lists.infradead.org
do {
chip = irq_data_get_irq_chip(data);
+ if (WARN_ON_ONCE(!chip))
+ return -ENODEV;
if (chip->irq_get_irqchip_state)
break;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
do {
chip = irq_data_get_irq_chip(data);
+ if (WARN_ON_ONCE(!chip))
+ return -ENODEV;
if (chip->irq_set_irqchip_state)
break;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY