genirq/debugfs: Add missing IRQCHIP_SUPPORTS_LEVEL_MSI debug

Debug is missing the IRQCHIP_SUPPORTS_LEVEL_MSI debug entry, making debugfs
slightly less useful.

Take this opportunity to also add a missing comment in the definition of
IRQCHIP_SUPPORTS_LEVEL_MSI.

Fixes: 6988e0e0d283 ("genirq/msi: Limit level-triggered MSI to platform devices")
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Yang Yingliang <yangyingliang@huawei.com>
Cc: Sumit Garg <sumit.garg@linaro.org>
Link: https://lkml.kernel.org/r/20180622095254.5906-2-marc.zyngier@arm.com

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 4bd2f34..201de12 100644 (file)
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -503,6 +503,7 @@ struct irq_chip {
  * IRQCHIP_SKIP_SET_WAKE:      Skip chip.irq_set_wake(), for this irq chip
  * IRQCHIP_ONESHOT_SAFE:       One shot does not require mask/unmask
  * IRQCHIP_EOI_THREADED:       Chip requires eoi() on unmask in threaded mode
+ * IRQCHIP_SUPPORTS_LEVEL_MSI  Chip can provide two doorbells for Level MSIs
  */
 enum {
        IRQCHIP_SET_TYPE_MASKED         = (1 <<  0),

diff --git a/kernel/irq/debugfs.c b/kernel/irq/debugfs.c
index 4dadeb3..6f63613 100644 (file)
--- a/kernel/irq/debugfs.c
+++ b/kernel/irq/debugfs.c
@@ -55,6 +55,7 @@ static const struct irq_bit_descr irqchip_flags[] = {
        BIT_MASK_DESCR(IRQCHIP_SKIP_SET_WAKE),
        BIT_MASK_DESCR(IRQCHIP_ONESHOT_SAFE),
        BIT_MASK_DESCR(IRQCHIP_EOI_THREADED),
+       BIT_MASK_DESCR(IRQCHIP_SUPPORTS_LEVEL_MSI),
 };
 
 static void