Subject: [PATCH v2 06/23] PCI: aardvark: Make MSI irq_chip structures static driver structures

From: Marek Behún <[email-masked]>
Date: Mon, 10 Jan 2022 02:50:01 +0100

Marc Zyngier says [1] that we should use struct irq_chip as a global
static struct in the driver. Even though the structure currently
contains a dynamic member (parent_device), Marc says [2] that he plans
to kill it and make the structure completely static.

Convert Aardvark's priv->msi_bottom_irq_chip and priv->msi_irq_chip to
static driver structure.

[1] https://lore.kernel.org/linux-pci/[email-masked]/
[2] https://lore.kernel.org/linux-pci/[email-masked]/

Signed-off-by: Marek Behún <[email-masked]>
---
 drivers/pci/controller/pci-aardvark.c | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index 252033a46e1e..441100bacb68 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -275,8 +275,6 @@ struct advk_pcie {
 	raw_spinlock_t irq_lock;
 	struct irq_domain *msi_domain;
 	struct irq_domain *msi_inner_domain;
-	struct irq_chip msi_bottom_irq_chip;
-	struct irq_chip msi_irq_chip;
 	struct msi_domain_info msi_domain_info;
 	DECLARE_BITMAP(msi_used, MSI_IRQ_NUM);
 	struct mutex msi_used_lock;
@@ -1199,6 +1197,12 @@ static int advk_msi_set_affinity(struct irq_data *irq_data,
 	return -EINVAL;
 }
 
+static struct irq_chip advk_msi_bottom_irq_chip = {
+	.name			= "MSI",
+	.irq_compose_msi_msg	= advk_msi_irq_compose_msi_msg,
+	.irq_set_affinity	= advk_msi_set_affinity,
+};
+
 static int advk_msi_irq_domain_alloc(struct irq_domain *domain,
 				     unsigned int virq,
 				     unsigned int nr_irqs, void *args)
@@ -1215,7 +1219,7 @@ static int advk_msi_irq_domain_alloc(struct irq_domain *domain,
 
 	for (i = 0; i < nr_irqs; i++)
 		irq_domain_set_info(domain, virq + i, hwirq + i,
-				    &pcie->msi_bottom_irq_chip,
+				    &advk_msi_bottom_irq_chip,
 				    domain->host_data, handle_simple_irq,
 				    NULL, NULL);
 
@@ -1285,29 +1289,23 @@ static const struct irq_domain_ops advk_pcie_irq_domain_ops = {
 	.xlate = irq_domain_xlate_onecell,
 };
 
+static struct irq_chip advk_msi_irq_chip = {
+	.name = "advk-MSI",
+};
+
 static int advk_pcie_init_msi_irq_domain(struct advk_pcie *pcie)
 {
 	struct device *dev = &pcie->pdev->dev;
 	struct device_node *node = dev->of_node;
-	struct irq_chip *bottom_ic, *msi_ic;
 	struct msi_domain_info *msi_di;
 	phys_addr_t msi_msg_phys;
 
 	mutex_init(&pcie->msi_used_lock);
 
-	bottom_ic = &pcie->msi_bottom_irq_chip;
-
-	bottom_ic->name = "MSI";
-	bottom_ic->irq_compose_msi_msg = advk_msi_irq_compose_msi_msg;
-	bottom_ic->irq_set_affinity = advk_msi_set_affinity;
-
-	msi_ic = &pcie->msi_irq_chip;
-	msi_ic->name = "advk-MSI";
-
 	msi_di = &pcie->msi_domain_info;
 	msi_di->flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
 		MSI_FLAG_MULTI_PCI_MSI;
-	msi_di->chip = msi_ic;
+	msi_di->chip = &advk_msi_irq_chip;
 
 	msi_msg_phys = virt_to_phys(&pcie->msi_msg);
 
-- 
2.34.1

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