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vfio: Fix handling of error returned by 'vfio_group_get_from_dev()'

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'vfio_group_get_from_dev()' seems to return only NULL on error, not an
error pointer.

Fixes: 2169037dc3 ("vfio iommu: Added pin and unpin callback functions to vfio_iommu_driver_ops")
Fixes: c086de818d ("vfio iommu: Add blocking notifier to notify DMA_UNMAP")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Christophe JAILLET 2016-11-30 08:06:12 +01:00 committed by Alex Williamson
parent 5ba6de98c7
commit d256459fae
1 changed files with 8 additions and 8 deletions
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16
drivers/vfio/vfio.c
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@ -1933,8 +1933,8 @@ int vfio_pin_pages(struct device *dev, unsigned long *user_pfn, int npage,
return -E2BIG;
group = vfio_group_get_from_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
if (!group)
return -ENODEV;
ret = vfio_group_add_container_user(group);
if (ret)
@ -1982,8 +1982,8 @@ int vfio_unpin_pages(struct device *dev, unsigned long *user_pfn, int npage)
return -E2BIG;
group = vfio_group_get_from_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
if (!group)
return -ENODEV;
ret = vfio_group_add_container_user(group);
if (ret)
@ -2019,8 +2019,8 @@ int vfio_register_notifier(struct device *dev, struct notifier_block *nb)
return -EINVAL;
group = vfio_group_get_from_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
if (!group)
return -ENODEV;
ret = vfio_group_add_container_user(group);
if (ret)
@ -2055,8 +2055,8 @@ int vfio_unregister_notifier(struct device *dev, struct notifier_block *nb)
return -EINVAL;
group = vfio_group_get_from_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
if (!group)
return -ENODEV;
ret = vfio_group_add_container_user(group);
if (ret)