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-rw-r--r--drivers/irqchip/irq-loongson-liointc.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-loongson-liointc.c b/drivers/irqchip/irq-loongson-liointc.c
index 18de2c09ece4..63b61474a0cc 100644
--- a/drivers/irqchip/irq-loongson-liointc.c
+++ b/drivers/irqchip/irq-loongson-liointc.c
@@ -32,6 +32,8 @@
#define LIOINTC_SHIFT_INTx 4
+#define LIOINTC_ERRATA_IRQ 10
+
struct liointc_handler_data {
struct liointc_priv *priv;
u32 parent_int_map;
@@ -41,6 +43,7 @@ struct liointc_priv {
struct irq_chip_generic *gc;
struct liointc_handler_data handler[LIOINTC_NUM_PARENT];
u8 map_cache[LIOINTC_CHIP_IRQ];
+ bool has_lpc_irq_errata;
};
static void liointc_chained_handle_irq(struct irq_desc *desc)
@@ -54,8 +57,15 @@ static void liointc_chained_handle_irq(struct irq_desc *desc)
pending = readl(gc->reg_base + LIOINTC_REG_INTC_STATUS);
- if (!pending)
- spurious_interrupt();
+ if (!pending) {
+ /* Always blame LPC IRQ if we have that bug */
+ if (handler->priv->has_lpc_irq_errata &&
+ (handler->parent_int_map & ~gc->mask_cache &
+ BIT(LIOINTC_ERRATA_IRQ)))
+ pending = BIT(LIOINTC_ERRATA_IRQ);
+ else
+ spurious_interrupt();
+ }
while (pending) {
int bit = __ffs(pending);