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authorAlex Williamson <alex.williamson@redhat.com>2012-10-10 09:10:32 -0600
committerAlex Williamson <alex.williamson@redhat.com>2012-10-10 09:10:32 -0600
commit9dbdfd23b7638d054f3b0e70c64dfb9f297f2a9f (patch)
tree85b24e35aea412ea63bae6b71a679b9d030c06fa /drivers/vfio
parent34002f54d2bd8e8ac04f0da0847f71a8a06a5d38 (diff)
downloadlinux-9dbdfd23b7638d054f3b0e70c64dfb9f297f2a9f.tar.gz
vfio: Move PCI INTx eventfd setting earlier
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. Cc: stable@vger.kernel.org Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
-rw-r--r--drivers/vfio/pci/vfio_pci_intrs.c5
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 d8dedc7d391..c8139a598f8 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.