[tip: irq/core] irqchip/loongson-pch-msi: Prepare get_pch_msi_handle() for AVECINTC

["tip-bot2 for Tianyang Zhang" <tip-bot2@linutronix.de>]

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     a1d4646d34c6642194a421ca9afbd060b0f9aa00
Gitweb:        https://git.kernel.org/tip/a1d4646d34c6642194a421ca9afbd060b0f9aa00
Author:        Tianyang Zhang <zhangtianyang@loongson.cn>
AuthorDate:    Fri, 23 Aug 2024 18:43:36 +08:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Fri, 23 Aug 2024 20:40:27 +02:00

irqchip/loongson-pch-msi: Prepare get_pch_msi_handle() for AVECINTC

On Loongson-3C6000 and higher systems with AVECINTC irqchip, there may
be multiple PCI segments, but only one PCH-MSI irq domain. In this case,
let get_pch_msi_handle() return the first domain handle.

Co-developed-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Co-developed-by: Liupu Wang <wangliupu@loongson.cn>
Signed-off-by: Liupu Wang <wangliupu@loongson.cn>
Co-developed-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianyang Zhang <zhangtianyang@loongson.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240823104337.25577-1-zhangtianyang@loongson.cn

---
 drivers/irqchip/irq-loongson-pch-msi.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/irqchip/irq-loongson-pch-msi.c b/drivers/irqchip/irq-loongson-pch-msi.c
index d437318..0dc1455 100644
--- a/drivers/irqchip/irq-loongson-pch-msi.c
+++ b/drivers/irqchip/irq-loongson-pch-msi.c
@@ -255,17 +255,17 @@ IRQCHIP_DECLARE(pch_msi, "loongson,pch-msi-1.0", pch_msi_of_init);
 #ifdef CONFIG_ACPI
 struct fwnode_handle *get_pch_msi_handle(int pci_segment)
 {
-	int i;
+	if (cpu_has_avecint)
+		return pch_msi_handle[0];
 
-	for (i = 0; i < MAX_IO_PICS; i++) {
+	for (int i = 0; i < MAX_IO_PICS; i++) {
 		if (msi_group[i].pci_segment == pci_segment)
 			return pch_msi_handle[i];
 	}
-	return NULL;
+	return pch_msi_handle[0];
 }
 
-int __init pch_msi_acpi_init(struct irq_domain *parent,
-					struct acpi_madt_msi_pic *acpi_pchmsi)
+int __init pch_msi_acpi_init(struct irq_domain *parent, struct acpi_madt_msi_pic *acpi_pchmsi)
 {
 	int ret;
 	struct fwnode_handle *domain_handle;