Comment 37 for bug 1933301

Succeeding comment#29 and comment#36, and enlarging cma size larger e.g. 1G, could remove more error messages[1].

[1] append cma=1G in the kernel cmdline
ubuntu@segers:~$ dmesg | grep -i cma
[ 0.000000] cma: Failed to reserve 1024 MiB
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.11.0-43-generic root=UUID=e70c736e-0fc9-4459-9e23-d18d2fafb1bb ro sysrq_always_enabled cma=1G
[ 0.000000] Memory: 131355008K/134213440K available (15744K kernel code, 3572K rwdata, 13344K rodata, 7744K init, 1147K bss, 2858432K reserved, 0K cma-reserved)
ubuntu@segers:~$ dmesg | grep -i fail
[ 0.000000] cma: Failed to reserve 1024 MiB
[ 14.105493] dw_spi_mmio HISI0173:00: DMA init failed
[ 19.733645] sas: Enter sas_scsi_recover_host busy: 0 failed: 0
[ 20.998866] sas: --- Exit sas_scsi_recover_host: busy: 0 failed: 0 tries: 1
[ 21.050609] sas: Enter sas_scsi_recover_host busy: 0 failed: 0
[ 21.411963] sas: --- Exit sas_scsi_recover_host: busy: 0 failed: 0 tries: 1
[ 23.600179] hisi_sec2 0000:75:00.0: Failed to enable PASID
[ 23.606891] hisi_sec2 0000:75:00.0: fail to alloc uacce (-22)
[ 23.620062] hisi_sec2 0000:b5:00.0: Failed to enable PASID
[ 23.628695] hisi_sec2 0000:b5:00.0: fail to alloc uacce (-22)
ubuntu@segers:~$ uname -a
Linux segers 5.11.0-43-generic #47~20.04.2-Ubuntu SMP Mon Dec 13 11:10:13 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux
ubuntu@segers:~$