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drm/i915/gvt: throw error on unhandled vfio ioctls
author
Gerd Hoffmann
<kraxel@redhat.com>
Wed, 21 Mar 2018 14:08:47 +0000
(15:08 +0100)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Thu, 26 Apr 2018 09:02:02 +0000
(11:02 +0200)
commit
9f591ae60e1be026901398ef99eede91237aa3a1
upstream.
On unknown/unhandled ioctls the driver should return an error, so
userspace knows it tried to use something unsupported.
Cc: stable@vger.kernel.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpu/drm/i915/gvt/kvmgt.c
patch
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diff --git
a/drivers/gpu/drm/i915/gvt/kvmgt.c
b/drivers/gpu/drm/i915/gvt/kvmgt.c
index
83e88c7
..
9bf4045
100644
(file)
--- a/
drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/
drivers/gpu/drm/i915/gvt/kvmgt.c
@@
-1153,7
+1153,7
@@
static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
return 0;
}
- return
0
;
+ return
-ENOTTY
;
}
static ssize_t