diff options
| author | Alex Williamson <alex.williamson@redhat.com> | 2012-10-10 09:10:32 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-21 09:32:40 -0700 |
| commit | 7c1af9af57eafaad181505ef594d0214d0724647 (patch) | |
| tree | 6b14c7a8523870ef97a27968befd5acafa008560 | |
| parent | 1a5392619baf037a0aab6689ece7f4b9368d81be (diff) | |
vfio: Move PCI INTx eventfd setting earlier
commit 9dbdfd23b7638d054f3b0e70c64dfb9f297f2a9f upstream.
We need to be ready to recieve an interrupt as soon as we call
request_irq, so our eventfd context setting needs to be moved
earlier. Without this, an interrupt from our device or one
sharing the interrupt line can pass a NULL into eventfd_signal
and oops.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_intrs.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c index d8dedc7d3910..c8139a598f84 100644 --- a/drivers/vfio/pci/vfio_pci_intrs.c +++ b/drivers/vfio/pci/vfio_pci_intrs.c @@ -400,19 +400,20 @@ static int vfio_intx_set_signal(struct vfio_pci_device *vdev, int fd) return PTR_ERR(trigger); } + vdev->ctx[0].trigger = trigger; + if (!vdev->pci_2_3) irqflags = 0; ret = request_irq(pdev->irq, vfio_intx_handler, irqflags, vdev->ctx[0].name, vdev); if (ret) { + vdev->ctx[0].trigger = NULL; kfree(vdev->ctx[0].name); eventfd_ctx_put(trigger); return ret; } - vdev->ctx[0].trigger = trigger; - /* * INTx disable will stick across the new irq setup, * disable_irq won't. |