Request to include the following patch into stable for linux-4.19 and linux-4.20: scsi: mpt3sas: fix memory ordering on 64bit writes commit: 23c3828aa2f8 Commit 09c2f95ad404 introduced a bug apparent on powerpc64 systems causing SAS HBAs relying on mpt3sas to drop from the PCIe bus under load, rendering those devices virtually useless. As linux-4.19 is a longterm kernel, the bug would affect those systems for a long time otherwise.
