From: Thomas Gleixner <redacted>

For the upcoming device MSI support it's required to have a default
irq_chip::ack implementation (irq_chip_ack_parent) so the drivers do not
need to care.

Reviewed-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Thomas Gleixner <redacted>
Signed-off-by: Megha Dey <redacted>
---
 drivers/base/platform-msi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c
index 2c1e2e0..9d9ccfc 100644
--- a/drivers/base/platform-msi.c
+++ b/drivers/base/platform-msi.c

@@ -101,6 +101,8 @@ static void platform_msi_update_chip_ops(struct msi_domain_info *info)
 		chip->irq_mask = irq_chip_mask_parent;
 	if (!chip->irq_unmask)
 		chip->irq_unmask = irq_chip_unmask_parent;
+	if (!chip->irq_ack)
+		chip->irq_ack = irq_chip_ack_parent;
 	if (!chip->irq_eoi)
 		chip->irq_eoi = irq_chip_eoi_parent;
 	if (!chip->irq_set_affinity)

-- 
2.7.4