misc: pci_endpoint_test: Enable/Disable MSI using module param
In certain platforms like TI's DRA7 SoCs, use of legacy PCI interrupt is exclusive with use of MSI (Section 24.9.4.6.2.1 Legacy PCI Interrupts in http://www.ti.com/lit/ug/spruhz6i/spruhz6i.pdf). However pci_endpoint_test driver enables MSI by default in probe. In order for pci_endpoint_test to be able to test legacy interrupt, MSI should be disabled. Add a module param 'no_msi' to disable MSI (only when legacy interrupt has to be tested). Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> [bhelgaas: folded in static fix from Colin Ian King <colin.king@canonical.com>] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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@ -72,6 +72,11 @@ static DEFINE_IDA(pci_endpoint_test_ida);
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#define to_endpoint_test(priv) container_of((priv), struct pci_endpoint_test, \
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#define to_endpoint_test(priv) container_of((priv), struct pci_endpoint_test, \
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miscdev)
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miscdev)
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static bool no_msi;
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module_param(no_msi, bool, 0444);
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MODULE_PARM_DESC(no_msi, "Disable MSI interrupt in pci_endpoint_test");
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enum pci_barno {
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enum pci_barno {
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BAR_0,
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BAR_0,
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BAR_1,
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BAR_1,
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@ -451,7 +456,6 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
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int err;
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int err;
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int irq = 0;
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int irq = 0;
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int id;
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int id;
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bool no_msi = false;
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char name[20];
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char name[20];
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enum pci_barno bar;
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enum pci_barno bar;
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void __iomem *base;
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void __iomem *base;
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