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vfio: return -ENOTTY for unsupported device feature

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[ Upstream commit 16df67f2189a71a8310bcebddb87ed569e8352be ]

The two implementers of vfio_device_ops.device_feature,
vfio_cdx_ioctl_feature and vfio_pci_core_ioctl_feature, return
-ENOTTY in the fallthrough case when the feature is unsupported. For
consistency, the base case, vfio_ioctl_device_feature, should do the
same when device_feature == NULL, indicating an implementation has no
feature extensions.

Signed-off-by: Alex Mastro <amastro@fb.com>
Link: https://lore.kernel.org/r/20250908-vfio-enotty-v1-1-4428e1539e2e@fb.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alex Mastro
2025-09-08 08:58:40 -07:00
committed by Greg Kroah-Hartman
parent 5561974e62
commit b679c74e55
1 changed files with 1 additions and 1 deletions
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2
drivers/vfio/vfio_main.c
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@@ -1195,7 +1195,7 @@ static int vfio_ioctl_device_feature(struct vfio_device *device,
feature.argsz - minsz);
default:
if (unlikely(!device->ops->device_feature))
return -EINVAL;
return -ENOTTY;
return device->ops->device_feature(device, feature.flags,
arg->data,
feature.argsz - minsz);