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https://github.com/Ysurac/openmptcprouter.git
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102 lines
3.3 KiB
Diff
102 lines
3.3 KiB
Diff
From 663b9f99bb35dbc0c7b685f71ee3668a60d31320 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org>
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Date: Mon, 10 Jan 2022 02:02:00 +0100
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Subject: [PATCH] PCI: aardvark: Make main irq_chip structure a static driver
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structure
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Marc Zyngier says [1] that we should use struct irq_chip as a global
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static struct in the driver. Even though the structure currently
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contains a dynamic member (parent_device), Marc says [2] that he plans
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to kill it and make the structure completely static.
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We have already converted others irq_chip structures in this driver in
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this way, but we omitted this one because the .name member is
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dynamically created from device's name, and the name is displayed in
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sysfs, so changing it would break sysfs ABI.
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The rationale for changing the name (to "advk-INT") in spite of sysfs
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ABI, and thus allowing to convert to a static structure, is that after
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the other changes we made in this series, the IRQ chip is basically
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something different: it no logner generates ERR and PME interrupts (they
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are generated by emulated bridge's rp_irq_chip).
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[1] https://lore.kernel.org/linux-pci/877dbcvngf.wl-maz@kernel.org/
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[2] https://lore.kernel.org/linux-pci/874k6gvkhz.wl-maz@kernel.org/
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Signed-off-by: Marek Behún <kabel@kernel.org>
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---
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drivers/pci/controller/pci-aardvark.c | 25 +++++++------------------
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1 file changed, 7 insertions(+), 18 deletions(-)
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--- a/drivers/pci/controller/pci-aardvark.c
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+++ b/drivers/pci/controller/pci-aardvark.c
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@@ -277,7 +277,6 @@ struct advk_pcie {
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u8 wins_count;
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struct irq_domain *rp_irq_domain;
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struct irq_domain *irq_domain;
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- struct irq_chip irq_chip;
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raw_spinlock_t irq_lock;
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struct irq_domain *msi_domain;
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struct irq_domain *msi_inner_domain;
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@@ -1426,14 +1425,19 @@ static void advk_pcie_irq_unmask(struct
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raw_spin_unlock_irqrestore(&pcie->irq_lock, flags);
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}
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+static struct irq_chip advk_irq_chip = {
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+ .name = "advk-INT",
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+ .irq_mask = advk_pcie_irq_mask,
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+ .irq_unmask = advk_pcie_irq_unmask,
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+};
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+
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static int advk_pcie_irq_map(struct irq_domain *h,
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unsigned int virq, irq_hw_number_t hwirq)
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{
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struct advk_pcie *pcie = h->host_data;
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irq_set_status_flags(virq, IRQ_LEVEL);
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- irq_set_chip_and_handler(virq, &pcie->irq_chip,
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- handle_level_irq);
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+ irq_set_chip_and_handler(virq, &advk_irq_chip, handle_level_irq);
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irq_set_chip_data(virq, pcie);
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return 0;
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@@ -1492,7 +1496,6 @@ static int advk_pcie_init_irq_domain(str
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struct device *dev = &pcie->pdev->dev;
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struct device_node *node = dev->of_node;
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struct device_node *pcie_intc_node;
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- struct irq_chip *irq_chip;
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int ret = 0;
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raw_spin_lock_init(&pcie->irq_lock);
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@@ -1503,28 +1506,14 @@ static int advk_pcie_init_irq_domain(str
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return -ENODEV;
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}
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- irq_chip = &pcie->irq_chip;
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-
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- irq_chip->name = devm_kasprintf(dev, GFP_KERNEL, "%s-irq",
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- dev_name(dev));
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- if (!irq_chip->name) {
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- ret = -ENOMEM;
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- goto out_put_node;
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- }
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-
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- irq_chip->irq_mask = advk_pcie_irq_mask;
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- irq_chip->irq_unmask = advk_pcie_irq_unmask;
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-
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pcie->irq_domain =
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irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
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&advk_pcie_irq_domain_ops, pcie);
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if (!pcie->irq_domain) {
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dev_err(dev, "Failed to get a INTx IRQ domain\n");
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ret = -ENOMEM;
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- goto out_put_node;
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}
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-out_put_node:
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of_node_put(pcie_intc_node);
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return ret;
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}
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