SG2042 SATA (DMA?) issues

Has anyone tried the recent SG2042 firmware and DMA coherence patches
with the onboard SATA? I am currently in the process of learning an
important lesson and wish I weren't. After a recent update, any ext4
filesystem that I put on a SATA drive quickly becomes corrupt. For
example,

EXT4-fs (sda1): mounted filesystem 54f42dce-97ef-4b4d-8a92-dab5d72a527b r/w with ordered data mode. Quota mode: disabled.
EXT4-fs error (device sda1): ext4_validate_block_bitmap:423: comm ext4lazyinit: bg 103: bad block bitmap checksum
EXT4-fs error (device sda1): ext4_validate_block_bitmap:423: comm ext4lazyinit: bg 255: bad block bitmap checksum
EXT4-fs error (device sda1): ext4_validate_block_bitmap:423: comm ext4lazyinit: bg 350: bad block bitmap checksum
EXT4-fs error (device sda1): ext4_validate_block_bitmap:423: comm ext4lazyinit: bg 886: bad block bitmap checksum
...

Here's a different error, from a different drive:

EXT4-fs (sdb1): ext4_check_descriptors: Block bitmap for group 109 overlaps superblock
EXT4-fs (sdb1): group descriptors corrupted!

These are two new drives, fresh out of the box. Running fsck doesn't
help -- the corruption returns almost immediately. Similarly after a
reformat.

I am testing with linux-next-20260529, and the following patches from
the mailing list. OpenSBI, zsbl, EDK2, and fip.bin are all up-to-date.

commit fe7d4d1c81361d02c8156c3989b8b07edebf96bf
Author: Vivian Wang <[email protected]>
Date:   Mon Mar 9 19:09:38 2026 +0800

    riscv: mm: Define DIRECT_MAP_PHYSMEM_END

commit 8e12c1f0ee16bd901df098d5133a2041a3f5383a
Author: Guo Ren (Alibaba DAMO Academy) <[email protected]>
Date:   Tue Apr 21 10:31:40 2026 -0400

    riscv: errata: Add ERRATA_THEAD_WRITE_ONCE fixup

commit d2c0c75176d2c220b7c13ae1dc2ca029d99f42fe
Author: Inochi Amaoto <[email protected]>
Date:   Tue Apr 7 07:26:55 2026 +0800

    riscv: dts: sophgo: sg2042: use hex for CPU unit address

commit f582c404b9e034efa5891db6a5a0751a7488659c
Author: Han Gao <[email protected]>
Date:   Wed Apr 1 01:56:58 2026 +0800

    PCI: Add quirk to disable PCIe port services on Sophgo SG2042

commit 6b2339e1faf20f8e819f729fd0b8b94a0169e6d2
Author: Han Gao <[email protected]>
Date:   Wed Apr 1 01:56:57 2026 +0800

    PCI: Add per-device flag to disable native PCIe port services

commit 7e9fc0eb8ecdc96d31af68920b55f1885683ec88
Author: Icenowy Zheng <[email protected]>
Date:   Wed Apr 8 00:01:43 2026 +0800

    riscv: dts: sophgo: reduce SG2042 MSI count to 16