drm/i915/gvt: Get reference to KVM iff attachment to VM is successful
authorSean Christopherson <seanjc@google.com>
Fri, 11 Nov 2022 00:22:24 +0000 (00:22 +0000)
committerZhenyu Wang <zhenyuw@linux.intel.com>
Fri, 11 Nov 2022 05:13:50 +0000 (13:13 +0800)
commit9ed1fdee9ee324f3505ff066287ee53143caaaa2
tree025ba26f9e2c5402af046c65093f332d8b291cd9
parentf0c4d9fc9cc9462659728d168387191387e903cc
drm/i915/gvt: Get reference to KVM iff attachment to VM is successful

Get a reference to KVM if and only if a vGPU is successfully attached to
the VM to avoid leaking a reference if there's no available vGPU.  On
open_device() failure, vfio_device_open() doesn't invoke close_device().

Fixes: 421cfe6596f6 ("vfio: remove VFIO_GROUP_NOTIFY_SET_KVM")
Cc: stable@vger.kernel.org
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20221111002225.2418386-2-seanjc@google.com
drivers/gpu/drm/i915/gvt/kvmgt.c