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>
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index 1f37ad3..deb2030 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -72,6 +72,11 @@
#define to_endpoint_test(priv) container_of((priv), struct pci_endpoint_test, \
miscdev)
+
+static 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 @@
int err;
int irq = 0;
int id;
- bool no_msi = false;
char name[20];
enum pci_barno bar;
void __iomem *base;