[PATCH v2 15/15] PCI: Refactor HT advertising of NO_MSI flag
From: Marc Zyngier <maz@kernel.org>
Date: 2021-03-22 18:54:43
Also in:
linux-arm-kernel, linux-hyperv, linux-pci, linux-renesas-soc, linux-tegra, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
The few quirks that deal with NO_MSI tend to be copy-paste heavy. Refactor them so that the hierarchy of conditions is slightly cleaner. Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> --- drivers/pci/quirks.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 653660e3ba9e..972bb0f9f994 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c@@ -2585,10 +2585,8 @@ static int msi_ht_cap_enabled(struct pci_dev *dev) /* Check the HyperTransport MSI mapping to know whether MSI is enabled or not */ static void quirk_msi_ht_cap(struct pci_dev *dev) { - if (dev->subordinate && !msi_ht_cap_enabled(dev)) { - pci_warn(dev, "MSI quirk detected; subordinate MSI disabled\n"); - dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; - } + if (!msi_ht_cap_enabled(dev)) + quirk_disable_msi(dev); } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE, quirk_msi_ht_cap);
@@ -2601,9 +2599,6 @@ static void quirk_nvidia_ck804_msi_ht_cap(struct pci_dev *dev) { struct pci_dev *pdev; - if (!dev->subordinate) - return; - /* * Check HT MSI cap on this chipset and the root one. A single one * having MSI is enough to be sure that MSI is supported.
@@ -2611,10 +2606,8 @@ static void quirk_nvidia_ck804_msi_ht_cap(struct pci_dev *dev) pdev = pci_get_slot(dev->bus, 0); if (!pdev) return; - if (!msi_ht_cap_enabled(dev) && !msi_ht_cap_enabled(pdev)) { - pci_warn(dev, "MSI quirk detected; subordinate MSI disabled\n"); - dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; - } + if (!msi_ht_cap_enabled(pdev)) + quirk_msi_ht_cap(dev); pci_dev_put(pdev); } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_CK804_PCIE,
--
2.29.2
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