linux-kernel - [PATCH 3/7] misc: pci_endpoint

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Date:   Mon, 30 Dec 2019 18:03:11 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/7] misc: pci_endpoint_test: Add ioctl to clear IRQ

Add ioctl to clear IRQ which can be used to free the allocated
IRQ vectors and free the requested IRQ.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/misc/pci_endpoint_test.c | 10 ++++++++++
 include/uapi/linux/pcitest.h     |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index 04505890eae9..861b3d0cea19 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -555,6 +555,13 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)
 	return ret;
 }
 
+static bool pci_endpoint_test_clear_irq(struct pci_endpoint_test *test)
+{
+	pci_endpoint_test_release_irq(test);
+	pci_endpoint_test_free_irq_vectors(test);
+	return true;
+}
+
 static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
 				      int req_irq_type)
 {
@@ -625,6 +632,9 @@ static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd,
 	case PCITEST_GET_IRQTYPE:
 		ret = irq_type;
 		break;
+	case PCITEST_CLEAR_IRQ:
+		ret = pci_endpoint_test_clear_irq(test);
+		break;
 	}
 
 ret:
diff --git a/include/uapi/linux/pcitest.h b/include/uapi/linux/pcitest.h
index cbf422e56696..c6d3076fa732 100644
--- a/include/uapi/linux/pcitest.h
+++ b/include/uapi/linux/pcitest.h
@@ -19,5 +19,6 @@
 #define PCITEST_MSIX		_IOW('P', 0x7, int)
 #define PCITEST_SET_IRQTYPE	_IOW('P', 0x8, int)
 #define PCITEST_GET_IRQTYPE	_IO('P', 0x9)
+#define PCITEST_CLEAR_IRQ	_IO('P', 0x10)
 
 #endif /* __UAPI_LINUX_PCITEST_H */
-- 
2.17.1