[irqchip: irq/irqchip-next] genirq/msi: Provide default .irq_ack() for MSI chips

[irqchip-bot for Valentin Schneider]

The following commit has been merged into the irq/irqchip-next branch of irqchip:

Commit-ID:     69ad12c13d582c8e28404138d8e19ea7f06166a5
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/69ad12c13d582c8e28404138d8e19ea7f06166a5
Author:        Valentin Schneider <valentin.schneider@xxxxxxx>
AuthorDate:    Tue, 29 Jun 2021 13:50:07 +01:00
Committer:     Marc Zyngier <maz@xxxxxxxxxx>
CommitterDate: Thu, 12 Aug 2021 15:48:21 +01:00

genirq/msi: Provide default .irq_ack() for MSI chips

MSI_FLAG_USE_DEF_CHIP_OPS can now provide a default .irq_eoi() to any
irqchip attached to an MSI domain. Complement it by adding a default
.irq_ack() implementation.

Signed-off-by: Valentin Schneider <valentin.schneider@xxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210629125010.458872-11-valentin.schneider@xxxxxxx
---
 kernel/irq/msi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index c975909..127e0dd 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -274,6 +274,8 @@ static void msi_domain_update_chip_ops(struct msi_domain_info *info)
 	BUG_ON(!chip || !chip->irq_mask || !chip->irq_unmask);
 	if (!chip->irq_set_affinity)
 		chip->irq_set_affinity = msi_domain_set_affinity;
+	if (!chip->irq_ack)
+		chip->irq_ack = irq_chip_ack_parent;
 	if (!chip->irq_eoi)
 		chip->irq_eoi = irq_chip_eoi_parent;
 }