diff options
Diffstat (limited to 'drivers/uio/uio.c')
| -rw-r--r-- | drivers/uio/uio.c | 12 |
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; |