Adding regressions list so that this can be tracked properly, including the full report below.
Oleksandr Natalenko <oleksa...@natalenko.name> writes: > Hello. > > The following upstream commits: > > aa6f8dcbab47 swiotlb: rework "fix info leak with DMA_FROM_DEVICE" > ddbd89deb7d3 swiotlb: fix info leak with DMA_FROM_DEVICE > > break ath9k-based Wi-Fi access point for me. The AP emits beacons, but no > client can connect to it, either from the very beginning, or shortly after > start. These are the only symptoms I've noticed (i.e., no BUG/WARNING > messages in `dmesg` etc). > > The hardware is: > > ``` > $ dmesg | grep -i swiotlb > [ 0.426785] PCI-DMA: Using software bounce buffering for IO (SWIOTLB) > > BIOS Information > Vendor: American Megatrends Inc. > Version: P1.50 > Release Date: 04/16/2018 > > Base Board Information > Manufacturer: ASRock > Product Name: J3710-ITX > > 02:00.0 Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter > (rev 01) > Subsystem: Lite-On Communications Inc Device 6621 > 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 17 > Region 0: Memory at 81400000 (64-bit, non-prefetchable) [size=512K] > Expansion ROM at 81480000 [disabled] [size=64K] > Capabilities: [40] Power Management version 2 > Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA > PME(D0+,D1+,D2+,D3hot+,D3cold+) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+ > Address: 0000000000000000 Data: 0000 > Masking: 00000000 Pending: 00000000 > Capabilities: [70] Express (v2) Endpoint, MSI 00 > DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s > unlimited, L1 <64us > ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- > SlotPowerLimit 10.000W > DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq- > RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop- > MaxPayload 128 bytes, MaxReadReq 512 bytes > DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ > TransPend- > LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit > Latency L0s <4us, L1 <64us > ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp- > LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+ > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- > LnkSta: Speed 2.5GT/s (ok), Width x1 (ok) > TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- > DevCap2: Completion Timeout: Not Supported, TimeoutDis+ > NROPrPrP- LTR- > 10BitTagComp- 10BitTagReq- OBFF Not Supported, ExtFmt- > EETLPPrefix- > EmergencyPowerReduction Not Supported, > EmergencyPowerReductionInit- > FRS- TPHComp- ExtTPHComp- > AtomicOpsCap: 32bit- 64bit- 128bitCAS- > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR- > OBFF Disabled, > AtomicOpsCtl: ReqEn- > LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- > 2Retimers- DRS- > LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis- > Transmit Margin: Normal Operating Range, > EnterModifiedCompliance- ComplianceSOS- > Compliance De-emphasis: -6dB > LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- > EqualizationPhase1- > EqualizationPhase2- EqualizationPhase3- > LinkEqualizationRequest- > Retimer- 2Retimers- CrosslinkRes: unsupported > Capabilities: [100 v1] Advanced Error Reporting > UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- > RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- > UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- > RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- > UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- > RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol- > CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- > AdvNonFatalErr- > CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- > AdvNonFatalErr+ > AERCap: First Error Pointer: 00, ECRCGenCap- ECRCGenEn- > ECRCChkCap- ECRCChkEn- > MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap- > HeaderLog: 00000000 00000000 00000000 00000000 > Capabilities: [140 v1] Virtual Channel > Caps: LPEVC=0 RefClk=100ns PATEntryBits=1 > Arb: Fixed- WRR32- WRR64- WRR128- > Ctrl: ArbSelect=Fixed > Status: InProgress- > VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans- > Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256- > Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=ff > Status: NegoPending- InProgress- > Capabilities: [160 v1] Device Serial Number 00-00-00-00-00-00-00-00 > Kernel driver in use: ath9k > Kernel modules: ath9k > ``` > > These commits appeared in v5.17 and v5.16.15, and both kernels are broken for > me. I'm pretty confident these commits make the difference since I've built > both v5.17 and v5.16.15 without them, and it fixed the issue. > > The machine has also got another Wi-Fi card that acts as a 802.11ax AP, and > it is not affected: > > ``` > 01:00.0 Unclassified device [0002]: MEDIATEK Corp. MT7915E 802.11ax PCI > Express Wireless Network Adapter (prog-if 80) > ``` > > So, I do understand this might be an issue with regard to SG I/O handling in > ath9k, hence relevant people in Cc. > > Please suggest on how to deal with this. Both me and Olha (in Cc) will be > glad to test patches if needed. In case any extra info is required, please > also let me know. > > Thanks. -- https://patchwork.kernel.org/project/linux-wireless/list/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
