stable inclusion
from stable-5.10.4
commit be9aaec325cbc588a5393c04b015b18d2e3dff2e
bugzilla: 46903

--------------------------------

commit 16b8fe4c upstream.

In case an error occurs in vfio_pci_enable() before the call to
vfio_pci_probe_mmaps(), vfio_pci_disable() will  try to iterate
on an uninitialized list and cause a kernel panic.

Lets move to the initialization to vfio_pci_probe() to fix the
issue.
Signed-off-by: NEric Auger <eric.auger@redhat.com>
Fixes: 05f0c03f ("vfio-pci: Allow to mmap sub-page MMIO BARs if the mmio page is exclusive")
CC: Stable <stable@vger.kernel.org> # v4.7+
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>