JMB595 connected to pcie expande-pi5

### Describe the bug commit ee95f3c56a0d8942f43086abbb832244312c08d2 Author: Arthur Husband <artmoty@gmail.com> Date: Mon Apr 6 15:23:35 2026 -0700 ata: ahci: force 32-bit DMA for JMicron JMB582/JMB585 [ Upstream commit 105c42566a550e2d05fc14f763216a8765ee5d0e ] This patch causes my jmb585 to error on startup, hence the drives don't show up. >>>>>>>>>> from my journal May 09 12:13:07 pi5.internal3 kernel: ahci 0001:01:00.0: enabling device (0000 -> 0002) May 09 12:13:07 pi5.internal3 kernel: ahci 0001:01:00.0: controller can't do 64bit DMA, forcing 32bit May 09 12:13:07 pi5.internal3 kernel: ahci 0001:01:00.0: SSS flag set, parallel bus scan disabled May 09 12:13:07 pi5.internal3 kernel: ahci 0001:01:00.0: AHCI vers 0001.0301, 32 command slots, 6 Gbps, SATA mode May 09 12:13:07 pi5.internal3 kernel: ahci 0001:01:00.0: 5/5 ports implemented (port mask 0x1f) May 09 12:13:07 pi5.internal3 kernel: ahci 0001:01:00.0: flags: ncq sntf stag pm led clo pmp fbs pio slum part ccc apst boh May 09 12:13:07 pi5.internal3 kernel: ahci 0001:01:00.0: failed to start port 0 (errno=-12) May 09 12:13:07 pi5.internal3 kernel: ahci 0001:01:00.0: probe with driver ahci failed with error -12 >>>>>>>>>>>>>>>>> lspci-v 0001:00:00.0 PCI bridge: Broadcom Inc. and subsidiaries BCM2712 PCIe Bridge (rev 21) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0, IRQ 38 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 Memory behind bridge: 80000000-800fffff [size=1M] [32-bit] Prefetchable memory behind bridge: [disabled] [64-bit] Capabilities: [48] Power Management version 3 Capabilities: [ac] Express Root Port (Slot-), IntMsgNum 0 Capabilities: [100] Advanced Error Reporting Capabilities: [160] Virtual Channel Capabilities: [180] Vendor Specific Information: ID=0000 Rev=0 Len=028 <?> Capabilities: [300] Secondary PCI Express Kernel driver in use: pcieport 0001:01:00.0 SATA controller: JMicron Technology Corp. JMB58x AHCI SATA controller (prog-if 01 [AHCI 1.0]) Subsystem: JMicron Technology Corp. Device 0000 Flags: bus master, fast devsel, latency 0, IRQ 170 Memory at 1b80010000 (32-bit, non-prefetchable) [size=8K] Expansion ROM at 1b80000000 [virtual] [disabled] [size=64K] Capabilities: [80] Power Management version 3 Capabilities: [90] MSI: Enable+ Count=8/8 Maskable- 64bit+ Capabilities: [c0] Express Legacy Endpoint, IntMsgNum 0 Capabilities: [100] Advanced Error Reporting Capabilities: [150] Device Serial Number 00-00-00-00-00-00-00-00 Capabilities: [160] Power Budgeting <?> Capabilities: [1b8] Latency Tolerance Reporting Capabilities: [300] Secondary PCI Express Capabilities: [900] L1 PM Substates Kernel driver in use: ahci Kernel modules: ahci 0002:00:00.0 PCI bridge: Broadcom Inc. and subsidiaries BCM2712 PCIe Bridge (rev 21) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0, IRQ 39 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 Memory behind bridge: 00000000-004fffff [size=5M] [32-bit] Prefetchable memory behind bridge: [disabled] [64-bit] Capabilities: [48] Power Management version 3 Capabilities: [ac] Express Root Port (Slot-), IntMsgNum 0 Capabilities: [100] Advanced Error Reporting Capabilities: [160] Virtual Channel Capabilities: [180] Vendor Specific Information: ID=0000 Rev=0 Len=028 <?> Capabilities: [240] L1 PM Substates Capabilities: [300] Secondary PCI Express Kernel driver in use: pcieport 0002:01:00.0 Ethernet controller: Raspberry Pi Ltd RP1 PCIe 2.0 South Bridge Flags: bus master, fast devsel, latency 0, IRQ 39 Memory at 1f00410000 (32-bit, non-prefetchable) [size=16K] Memory at 1f00000000 (32-bit, non-prefetchable) [virtual] [size=4M] Memory at 1f00400000 (32-bit, non-prefetchable) [size=64K] Capabilities: [40] Power Management version 3 Capabilities: [70] Express Endpoint, IntMsgNum 0 Capabilities: [b0] MSI-X: Enable+ Count=61 Masked- Capabilities: [100] Advanced Error Reporting Kernel driver in use: rp1 >>>>>>>>>>>>>>>>>>>>> lspci -n 0001:00:00.0 0604: 14e4:2712 (rev 21) 0001:01:00.0 0106: 197b:0585 0002:00:00.0 0604: 14e4:2712 (rev 21) 0002:01:00.0 0200: 1de4:0001 ### Steps to reproduce the behaviour Boot a kernel on a pi5 with the specified patch. SATA drives do not show up. ### Device (s) Raspberry Pi 5 ### System Affects kernels 6.18+ ### Logs _No response_ ### Additional context _No response_