target/linux/generic/pending-5.15/850-0006-PCI-aardvark-Make-MSI-irq_chip-structures-static-dri.patch

   1 From 5eb36a6b9508da442aac80f4df23e3951bbfa7aa Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org>
   3 Date: Mon, 10 Jan 2022 00:03:41 +0100
   4 Subject: [PATCH] PCI: aardvark: Make MSI irq_chip structures static driver
   5  structures
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 Marc Zyngier says [1] that we should use struct irq_chip as a global
  11 static struct in the driver. Even though the structure currently
  12 contains a dynamic member (parent_device), Marc says [2] that he plans
  13 to kill it and make the structure completely static.
  14
  15 Convert Aardvark's priv->msi_bottom_irq_chip and priv->msi_irq_chip to
  16 static driver structure.
  17
  18 [1] https://lore.kernel.org/linux-pci/877dbcvngf.wl-maz@kernel.org/
  19 [2] https://lore.kernel.org/linux-pci/874k6gvkhz.wl-maz@kernel.org/
  20
  21 Signed-off-by: Marek Behún <kabel@kernel.org>
  22 ---
  23  drivers/pci/controller/pci-aardvark.c | 26 ++++++++++++--------------
  24  1 file changed, 12 insertions(+), 14 deletions(-)
  25
  26 --- a/drivers/pci/controller/pci-aardvark.c
  27 +++ b/drivers/pci/controller/pci-aardvark.c
  28 @@ -281,8 +281,6 @@ struct advk_pcie {
  29         raw_spinlock_t irq_lock;
  30         struct irq_domain *msi_domain;
  31         struct irq_domain *msi_inner_domain;
  32 -       struct irq_chip msi_bottom_irq_chip;
  33 -       struct irq_chip msi_irq_chip;
  34         struct msi_domain_info msi_domain_info;
  35         DECLARE_BITMAP(msi_used, MSI_IRQ_NUM);
  36         struct mutex msi_used_lock;
  37 @@ -1199,6 +1197,12 @@ static int advk_msi_set_affinity(struct
  38         return -EINVAL;
  39  }
  40
  41 +static struct irq_chip advk_msi_bottom_irq_chip = {
  42 +       .name                   = "MSI",
  43 +       .irq_compose_msi_msg    = advk_msi_irq_compose_msi_msg,
  44 +       .irq_set_affinity       = advk_msi_set_affinity,
  45 +};
  46 +
  47  static int advk_msi_irq_domain_alloc(struct irq_domain *domain,
  48                                      unsigned int virq,
  49                                      unsigned int nr_irqs, void *args)
  50 @@ -1215,7 +1219,7 @@ static int advk_msi_irq_domain_alloc(str
  51
  52         for (i = 0; i < nr_irqs; i++)
  53                 irq_domain_set_info(domain, virq + i, hwirq + i,
  54 -                                   &pcie->msi_bottom_irq_chip,
  55 +                                   &advk_msi_bottom_irq_chip,
  56                                     domain->host_data, handle_simple_irq,
  57                                     NULL, NULL);
  58
  59 @@ -1285,29 +1289,23 @@ static const struct irq_domain_ops advk_
  60         .xlate = irq_domain_xlate_onecell,
  61  };
  62
  63 +static struct irq_chip advk_msi_irq_chip = {
  64 +       .name = "advk-MSI",
  65 +};
  66 +
  67  static int advk_pcie_init_msi_irq_domain(struct advk_pcie *pcie)
  68  {
  69         struct device *dev = &pcie->pdev->dev;
  70         struct device_node *node = dev->of_node;
  71 -       struct irq_chip *bottom_ic, *msi_ic;
  72         struct msi_domain_info *msi_di;
  73         phys_addr_t msi_msg_phys;
  74
  75         mutex_init(&pcie->msi_used_lock);
  76
  77 -       bottom_ic = &pcie->msi_bottom_irq_chip;
  78 -
  79 -       bottom_ic->name = "MSI";
  80 -       bottom_ic->irq_compose_msi_msg = advk_msi_irq_compose_msi_msg;
  81 -       bottom_ic->irq_set_affinity = advk_msi_set_affinity;
  82 -
  83 -       msi_ic = &pcie->msi_irq_chip;
  84 -       msi_ic->name = "advk-MSI";
  85 -
  86         msi_di = &pcie->msi_domain_info;
  87         msi_di->flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
  88                 MSI_FLAG_MULTI_PCI_MSI;
  89 -       msi_di->chip = msi_ic;
  90 +       msi_di->chip = &advk_msi_irq_chip;
  91
  92         msi_msg_phys = virt_to_phys(&pcie->msi_msg);
  93