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Subject[PATCH 17/18] misc: pci_endpoint_test: Enable/Disable MSI using module param
Date
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>
---
drivers/misc/pci_endpoint_test.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index 1f37ad39b169..1f64d943794d 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -72,6 +72,11 @@ static DEFINE_IDA(pci_endpoint_test_ida);

#define to_endpoint_test(priv) container_of((priv), struct pci_endpoint_test, \
miscdev)
+
+bool no_msi;
+module_param(no_msi, bool, 0444);
+MODULE_PARM_DESC(no_msi, "Disable MSI interrupt in pci_endpoint_test");
+
enum pci_barno {
BAR_0,
BAR_1,
@@ -451,7 +456,6 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
int err;
int irq = 0;
int id;
- bool no_msi = false;
char name[20];
enum pci_barno bar;
void __iomem *base;
--
2.11.0
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