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authorKishon Vijay Abraham I <kishon@ti.com>2017-10-11 14:14:38 +0530
committerBjorn Helgaas <bhelgaas@google.com>2017-10-31 15:33:46 -0500
commitb7636e816adcb52bc96b6fb7bc9d141cbfd17ddb (patch)
tree1ea4fa1ff02a2df79fd46682f7dc46d3eb16fabb /drivers/misc/pci_endpoint_test.c
parent139838fffec40296d7235982a1a9b917ba31530f (diff)
misc: pci_endpoint_test: Fix BUG_ON error during pci_disable_msi()
pci_disable_msi() throws a Kernel BUG if the driver has successfully requested an IRQ and not released it. Fix it here by freeing IRQs before invoking pci_disable_msi(). Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/misc/pci_endpoint_test.c')
-rw-r--r--drivers/misc/pci_endpoint_test.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index bf64d150ec41..320276f42653 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -92,6 +92,7 @@ struct pci_endpoint_test {
void __iomem *bar[6];
struct completion irq_raised;
int last_irq;
+ int num_irqs;
/* mutex to protect the ioctls */
struct mutex mutex;
struct miscdevice miscdev;
@@ -513,6 +514,7 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
irq = pci_alloc_irq_vectors(pdev, 1, 32, PCI_IRQ_MSI);
if (irq < 0)
dev_err(dev, "failed to get MSI interrupts\n");
+ test->num_irqs = irq;
}
err = devm_request_irq(dev, pdev->irq, pci_endpoint_test_irqhandler,
@@ -587,6 +589,9 @@ err_iounmap:
pci_iounmap(pdev, test->bar[bar]);
}
+ for (i = 0; i < irq; i++)
+ devm_free_irq(dev, pdev->irq + i, test);
+
err_disable_msi:
pci_disable_msi(pdev);
pci_release_regions(pdev);
@@ -600,6 +605,7 @@ err_disable_pdev:
static void pci_endpoint_test_remove(struct pci_dev *pdev)
{
int id;
+ int i;
enum pci_barno bar;
struct pci_endpoint_test *test = pci_get_drvdata(pdev);
struct miscdevice *misc_device = &test->miscdev;
@@ -616,6 +622,8 @@ static void pci_endpoint_test_remove(struct pci_dev *pdev)
if (test->bar[bar])
pci_iounmap(pdev, test->bar[bar]);
}
+ for (i = 0; i < test->num_irqs; i++)
+ devm_free_irq(&pdev->dev, pdev->irq + i, test);
pci_disable_msi(pdev);
pci_release_regions(pdev);
pci_disable_device(pdev);