Hello!
Meanwhile I found the culprit:
https://www.spinics.net/lists/linux-usb/msg141467.html
and
https://www.spinics.net/lists/linux-usb/msg141468.html
Especially the last change breaks things here completely. After removing them by
the attached patch, problems are gone and device works again as expected (I tested
with the original 24 kB bulk size which was horribly broken w/o the attached
patch). This means: the additional repair steps are not just breaking things but
are even unnecessary (it's working perfectly without those changes) here.
I tested with 2 USB 3.1 host controllers:
USB controller: Advanced Micro Devices, Inc. [AMD] Raven USB 3.1 (prog-if 30 [XHCI])
05:00.3 0c03: 1022:15e0 (prog-if 30 [XHCI])
Subsystem: 1043:201f
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin D routed to IRQ 37
Region 0: Memory at f7300000 (64-bit, non-prefetchable) [size=1M]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [64] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <4us, L1
unlimited
ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
SlotPowerLimit 0.000W
DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+
MaxPayload 256 bytes, MaxReadReq 512 bytes
DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
LnkCap: Port #0, Speed 8GT/s, Width x16, ASPM L0s L1, Exit
Latency L0s <64ns, L1 <1us
ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 8GT/s, Width x16, TrErr- Train- SlotClk+ DLActive-
BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Not Supported, TimeoutDis-, LTR+,
OBFF Not Supported
AtomicOpsCap: 32bit- 64bit- 128bitCAS-
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-,
OBFF Disabled
AtomicOpsCtl: ReqEn-
LnkSta2: Current De-emphasis Level: -3.5dB,
EqualizationComplete-, EqualizationPhase1-
EqualizationPhase2-, EqualizationPhase3-,
LinkEqualizationRequest-
Capabilities: [a0] MSI: Enable- Count=1/8 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [c0] MSI-X: Enable+ Count=8 Masked-
Vector table: BAR=0 offset=000fe000
PBA: BAR=0 offset=000ff000
Capabilities: [100 v1] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
The 2. device on the same machine has the PCI-ID 1022:15e1
Another USB3.1 host device tested with was:
USB controller: Advanced Micro Devices, Inc. [AMD] X370 Series Chipset USB 3.1
xHCI Controller (rev 02) (prog-if 30 [XHCI])
00:06.0 0c03: 1022:43b9 (rev 02) (prog-if 30 [XHCI])
Subsystem: 1b21:1142
Physical Slot: 6
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 29
Region 0: Memory at febd0000 (64-bit, non-prefetchable) [size=32K]
Capabilities: [50] MSI: Enable+ Count=1/8 Maskable- 64bit+
Address: 00000000fee0e000 Data: 4023
Capabilities: [78] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA
PME(D0-,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [80] Express (v2) Legacy Endpoint, MSI 00
DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <64ns, L1 <2us
ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+
MaxPayload 128 bytes, MaxReadReq 512 bytes
DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr+ TransPend-
LnkCap: Port #0, Speed 8GT/s, Width x4, ASPM L0s L1, Exit Latency
L0s <2us, L1 unlimited
ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 8GT/s, Width x4, TrErr- Train- SlotClk+ DLActive-
BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Not Supported, TimeoutDis-, LTR+,
OBFF Not Supported
AtomicOpsCap: 32bit- 64bit- 128bitCAS-
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-,
OBFF Disabled
AtomicOpsCtl: ReqEn-
LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+,
EqualizationPhase1+
EqualizationPhase2-, EqualizationPhase3-,
LinkEqualizationRequest-
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
Please fix those changes or disable them for the mentioned devices or add an
option to disable this additional alignment feature.
Thanks
Andreas
--- 1/drivers/usb/host/xhci-ring.c 2021-01-25 08:57:52.199210954 +0100
+++ 2/drivers/usb/host/xhci-ring.c 2021-01-25 08:59:29.450511420 +0100
@@ -3250,6 +3250,10 @@ static int xhci_align_td(struct xhci_hcd
/* we got lucky, last normal TRB data on segment is packet aligned */
if (unalign == 0)
return 0;
+ else {
+ xhci_dbg(xhci, "unaligned - but ignored\n");
+ return 0;
+ }
xhci_dbg(xhci, "Unaligned %d bytes, buff len %d\n",
unalign, *trb_buff_len);
