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path: root/drivers/uio/uio.c
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Diffstat (limited to 'drivers/uio/uio.c')
-rw-r--r--drivers/uio/uio.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 6276f13e9e12..65bf0676d54a 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -835,7 +835,15 @@ int __uio_register_device(struct module *owner,
info->uio_dev = idev;
if (info->irq && (info->irq != UIO_IRQ_CUSTOM)) {
- ret = devm_request_irq(idev->dev, info->irq, uio_interrupt,
+ /*
+ * Note that we deliberately don't use devm_request_irq
+ * here. The parent module can unregister the UIO device
+ * and call pci_disable_msi, which requires that this
+ * irq has been freed. However, the device may have open
+ * FDs at the time of unregister and therefore may not be
+ * freed until they are released.
+ */
+ ret = request_irq(info->irq, uio_interrupt,
info->irq_flags, info->name, idev);
if (ret)
goto err_request_irq;
@@ -871,6 +879,8 @@ void uio_unregister_device(struct uio_info *info)
uio_dev_del_attributes(idev);
+ free_irq(idev->info->irq, idev);
+
device_destroy(&uio_class, MKDEV(uio_major, idev->minor));
return;