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authorKishon Vijay Abraham I <kishon@ti.com>2017-08-18 16:58:09 +0200
committerBjorn Helgaas <bhelgaas@google.com>2017-08-29 23:00:40 +0200
commit0c8a5f9d89b988ecb612a53d9439db899866bf8b (patch)
tree140122ae09a3c8bb9211cd96d5927d0dbb2fda0b
parentmisc: pci_endpoint_test: Avoid using hard-coded BAR sizes (diff)
downloadlinux-0c8a5f9d89b988ecb612a53d9439db899866bf8b.tar.xz
linux-0c8a5f9d89b988ecb612a53d9439db899866bf8b.zip
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>
-rw-r--r--drivers/misc/pci_endpoint_test.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index 1f37ad39b169..deb203026496 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)
+
+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 @@ 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;