1. Please describe the problem:
When attempting to reboot or shutdown on the Mustang(xgene) the system segfaults and drops to a shell.

2. What is the Version-Release number of the kernel:
5.11 rcX

3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :

First 5.11 rc's

4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:

Install 5.11 rcX and attempt to reboot or shutdown.

5. Does this problem occur with the latest Rawhide kernel? To install the
   Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
   ``sudo dnf update --enablerepo=rawhide kernel``:

Yes.

6. Are you running any modules that not shipped with directly Fedora's kernel?:

No. 

7. Please attach the kernel logs. You can get the complete kernel log
   for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
   issue occurred on a previous boot, use the journalctl ``-b`` flag.