Describe the bug
commit ee95f3c
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
Describe the bug
commit ee95f3c
Author: Arthur Husband artmoty@gmail.com
Date: Mon Apr 6 15:23:35 2026 -0700
This patch causes my jmb585 to error on startup, hence the drives don't show up.
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
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