Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:45142 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932200AbcLHRhO (ORCPT ); Thu, 8 Dec 2016 12:37:14 -0500 From: Kalle Valo To: Bharat Kumar Gogada Cc: Bjorn Helgaas , "linux-kernel\@vger.kernel.org" , "linux-pci\@vger.kernel.org" , Marc Zyngier , "Janusz.Dziedzic\@tieto.com" , "rmanohar\@qti.qualcomm.com" , "ath9k-devel\@qca.qualcomm.com" , linux-wireless@vger.kernel.org Subject: Re: ATH9 driver issues on ARM64 References: <8520D5D51A55D047800579B094147198263A7222@XAP-PVEXMBX02.xlnx.xilinx.com> <20161208145608.GA19822@bhelgaas-glaptop.roam.corp.google.com> <8520D5D51A55D047800579B094147198263A72F5@XAP-PVEXMBX02.xlnx.xilinx.com> Date: Thu, 08 Dec 2016 19:36:58 +0200 In-Reply-To: <8520D5D51A55D047800579B094147198263A72F5@XAP-PVEXMBX02.xlnx.xilinx.com> (Bharat Kumar Gogada's message of "Thu, 8 Dec 2016 15:29:08 +0000") Message-ID: <874m2emif9.fsf@purkki.adurom.net> (sfid-20161208_183721_456213_7FD86866) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-wireless-owner@vger.kernel.org List-ID: Bharat Kumar Gogada writes: > > [+cc Kalle, ath9k list] Thanks, but please also CC linux-wireless. Full thread below for the folks there. >> On Thu, Dec 08, 2016 at 01:49:42PM +0000, Bharat Kumar Gogada wrote: >> > Hi, >> > >> > Did anyone test Atheros ATH9 driver(drivers/net/wireless/ath/ath9k/) >> > on ARM64. The end point is TP link wifi card with which supports >> > only legacy interrupts. >> >> If it works on other arches and the arm64 PCI enumeration works, my >> first guess would be an INTx issue, e.g., maybe the driver is waiting >> for an interrupt that never arrives. > We are not sure for now. >> >> > We are trying to test it on ARM64 with >> > (drivers/pci/host/pcie-xilinx-nwl.c) as root port. >> > >> > EP is getting enumerated and able to link up. >> > >> > But when we start scan system gets hanged. >> >> When you say the system hangs when you start a scan, I assume you mean >> a wifi scan, not the PCI enumeration. A problem with a wifi scan >> might cause a *process* to hang, but it shouldn't hang the entire >> system. >> > Yes wifi scan. >> > When we took trace we see that after we start scan assert message is >> > sent but there is no de assert from end point. >> >> Are you talking about a trace from a PCIe analyzer? Do you see an >> Assert_INTx PCIe message on the link? >> > Yes lecroy trace, yes we do see Assert_INTx and Deassert_INTx happening when we do interface link up. > When we have less debug prints in Atheros driver, and do wifi scan we see Assert_INTx but never Deassert_INTx, >> > What might cause end point not sending de assert ? >> >> If the endpoint doesn't send a Deassert_INTx message, I expect that >> would mean the driver didn't service the interrupt and remove the >> condition that caused the device to assert the interrupt in the first >> place. >> >> If the driver didn't receive the interrupt, it couldn't service it, of >> course. You could add a printk in the ath9k interrupt service >> routine to see if you ever get there. >> > The interrupt behavior is changing w.r.t amount of debug prints we add. (I kept many prints to aid debug) > root@Xilinx-ZCU102-2016_3:~# iw dev wlan0 scan > [ 83.064675] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.069486] ath9k: ath9k_ioread32 ffffff800a400024 > [ 83.074257] ath9k_hw_kill_interrupts 793 > [ 83.078260] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.083107] ath9k: ath9k_ioread32 ffffff800a400024 > [ 83.087882] ath9k_hw_kill_interrupts 793 > [ 83.095450] ath9k_hw_enable_interrupts 821 > [ 83.099557] ath9k_hw_enable_interrupts 825 > [ 83.103721] ath9k_hw_enable_interrupts 832 > [ 83.107887] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.112748] AR_SREV_9100 0 > [ 83.115438] ath9k_hw_enable_interrupts 848 > [ 83.119607] ath9k: ath9k_ioread32 ffffff800a400024 > [ 83.124389] ath9k_hw_intrpend 762 > [ 83.127761] (AR_SREV_9340(ah) val 0 > [ 83.131234] ath9k_hw_intrpend 767 > [ 83.134628] ath_isr 603 > [ 83.137134] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.141995] ath9k: ath9k_ioread32 ffffff800a400024 > [ 83.146771] ath9k_hw_kill_interrupts 793 > [ 83.150864] ath9k_hw_enable_interrupts 821 > [ 83.154971] ath9k_hw_enable_interrupts 825 > [ 83.159135] ath9k_hw_enable_interrupts 832 > [ 83.163300] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.168161] AR_SREV_9100 0 > [ 83.170852] ath9k_hw_enable_interrupts 848 > [ 83.170855] ath9k_hw_intrpend 762 > [ 83.178398] (AR_SREV_9340(ah) val 0 > [ 83.181873] ath9k_hw_intrpend 767 > [ 83.185265] ath_isr 603 > [ 83.187773] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.192635] ath9k: ath9k_ioread32 ffffff800a400024 > [ 83.197411] ath9k_hw_kill_interrupts 793 > [ 83.201414] ath9k: ath9k_ioread32 ffffff800a400024 > [ 83.206258] ath9k_hw_enable_interrupts 821 > [ 83.210368] ath9k_hw_enable_interrupts 825 > [ 83.214531] ath9k_hw_enable_interrupts 832 > [ 83.218698] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.223558] AR_SREV_9100 0 > [ 83.226243] ath9k_hw_enable_interrupts 848 > [ 83.226246] ath9k_hw_intrpend 762 > [ 83.233794] (AR_SREV_9340(ah) val 0 > [ 83.237268] ath9k_hw_intrpend 767 > [ 83.240661] ath_isr 603 > [ 83.243169] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.248030] ath9k: ath9k_ioread32 ffffff800a400024 > [ 83.252806] ath9k_hw_kill_interrupts 793 > [ 83.256811] ath9k: ath9k_ioread32 ffffff800a400024 > [ 83.261651] ath9k_hw_enable_interrupts 821 > [ 83.265753] ath9k_hw_enable_interrupts 825 > [ 83.269919] ath9k_hw_enable_interrupts 832 > [ 83.274083] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.278945] AR_SREV_9100 0 > [ 83.281630] ath9k_hw_enable_interrupts 848 > [ 83.281633] ath9k_hw_intrpend 762 > [ 83.281634] (AR_SREV_9340(ah) val 0 > [ 83.281637] ath9k_hw_intrpend 767 > [ 83.281648] ath_isr 603 > [ 83.281649] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.281651] ath9k: ath9k_ioread32 ffffff800a400024 > [ 83.281654] ath9k_hw_kill_interrupts 793 > [ 83.312192] ath9k: ath9k_ioread32 ffffff800a400024 > [ 83.317030] ath9k_hw_enable_interrupts 821 > [ 83.321132] ath9k_hw_enable_interrupts 825 > [ 83.325297] ath9k_hw_enable_interrupts 832 > [ 83.329463] ath9k: ath9k_iowrite32 ffffff800a400024 > [ 83.334324] AR_SREV_9100 0 > [ 83.337014] ath9k_hw_enable_interrupts 848 > .. > .. > This log continues until I turn off board without obtaining scanning result. > > In between I get following cpu stall outputs : > 230.457179] INFO: rcu_sched self-detected stall on CPU > [ 230.457185] 2-...: (31314 ticks this GP) idle=2d1/140000000000001/0 softirq=1400/1400 fqs=36713 > [ 230.457189] (t=36756 jiffies g=161 c=160 q=16169) > [ 230.457191] Task dump for CPU 2: > [ 230.457196] kworker/u8:4 R running task 0 1342 2 0x00000002 > [ 230.457207] Workqueue: phy0 ieee80211_scan_work > [ 230.457208] Call trace: > [ 230.457214] [] dump_backtrace+0x0/0x198 > [ 230.457219] [] show_stack+0x14/0x20 > [ 230.457224] [] sched_show_task+0x98/0xf8 > [ 230.457228] [] dump_cpu_task+0x40/0x50 > [ 230.457233] [] rcu_dump_cpu_stacks+0xa0/0xf0 > [ 230.457239] [] rcu_check_callbacks+0x468/0x748 > [ 230.457243] [] update_process_times+0x3c/0x68 > [ 230.457249] [] tick_sched_handle.isra.5+0x3c/0x50 > [ 230.457253] [] tick_sched_timer+0x44/0x90 > [ 230.457257] [] __hrtimer_run_queues+0xf0/0x178 > ** 10 printk messages dropped ** [ 230.457302] f8c0: 0000000000000000 0000000005f5e0ff 000000000001379a 3866666666666620 > [ 230.457306] f8e0: ffffff800a1b4065 0000000000000006 ffffff800a129000 ffffffc87b8010a8 > [ 230.457310] f900: ffffff808a1b4057 ffffff800a1c3000 ffffff800a1b3000 ffffff800a13b000 > [ 230.457314] f920: 0000000000000140 0000000000000006 ffffff800a1b3b10 ffffff800a1c39e8 > [ 230.457318] f940: 000000000000002f ffffff800a1b8a98 ffffff800a1b3ae8 ffffffc87b07f990 > [ 230.457322] f960: ffffff80080d6230 ffffffc87b07f990 ffffff80080d6234 0000000060000145 > ** 1 printk messages dropped ** [ 230.457329] [] el1_irq+0xa0/0x100 > ** 9 printk messages dropped ** [ 230.457373] [] ieee80211_hw_config+0x50/0x290 > [ 230.457377] [] ieee80211_scan_work+0x1f8/0x480 > [ 230.457383] [] process_one_work+0x120/0x378 > [ 230.457386] [] worker_thread+0x48/0x4b0 > [ 230.457391] [] kthread+0xd0/0xe8 > [ 230.457395] [] ret_from_fork+0x10/0x40 > [ 230.480389] ath9k_hw_intrpend 762 > > > [ 545.487987] ath9k: ath9k_ioread32 ffffff800a400024 > [ 545.526189] INFO: rcu_sched self-detected stall on CPU > [ 545.526195] 2-...: (97636 ticks this GP) idle=2d1/140000000000001/0 softirq=1400/1400 fqs=115374 > [ 545.526199] (t=115523 jiffies g=161 c=160 q=51066) > [ 545.526201] Task dump for CPU 2: > [ 545.526206] kworker/u8:4 R running task 0 1342 2 0x00000002 > ** 3 printk messages dropped ** [ 545.526231] [] show_stack+0x14/0x20 > ** 9 printk messages dropped ** [ 545.526280] [] arch_timer_handler_phys+0x30/0x40 > [ 545.526284] [] handle_percpu_devid_irq+0x78/0xa0 > [ 545.526291] [] generic_handle_irq+0x24/0x38 > [ 545.526296] [] __handle_domain_irq+0x5c/0xb8 > [ 545.526299] [] gic_handle_irq+0x64/0xc0 > [ 545.526302] Exception stack(0xffffffc87b07f870 to 0xffffffc87b07f990) > [ 545.526306] f860: 0000000000009732 ffffff800a1eaaa8 > ** 8 printk messages dropped ** [ 545.526341] f980: ffffff800a1c39e8 0000000000000036 > [ 545.526345] [] el1_irq+0xa0/0x100 > [ 545.526349] [] console_unlock+0x384/0x5b0 > [ 545.526353] [] vprintk_emit+0x2dc/0x4b0 > [ 545.526357] [] vprintk_default+0x38/0x40 > [ 545.526362] [] printk+0x58/0x60 > [ 545.526366] [] ath9k_iowrite32+0x9c/0xa8 > [ 545.526372] [] ath9k_hw_kill_interrupts+0x28/0xf0 > [ 545.526376] [] ath_reset+0x24/0x68 > ** 2 printk messages dropped ** [ 545.526391] [] ieee80211_hw_config+0x50/0x290 > ** 11 printk messages dropped ** [ 545.532834] ath9k_hw_kill_interrupts 793 > [ 545.532890] ath9k_hw_enable_interrupts 821 > > > But if we have less debug prints it does not reach EP handler sometimes, due to following > Condition in "kernel/irq/chip.c" in function handle_simple_irq > > if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) { > desc->istate |= IRQS_PENDING; > goto out_unlock; > } > Here irqd_irq_disabled is being set to 1. > > With lesser debug prints it stops after following prints: > root@Xilinx-ZCU102-2016_3:~# iw dev wlan0 scan > [ 54.781045] ath9k_hw_kill_interrupts 793 > [ 54.785007] ath9k_hw_kill_interrupts 793 > [ 54.792535] ath9k_hw_enable_interrupts 821 > [ 54.796642] ath9k_hw_enable_interrupts 825 > [ 54.800807] ath9k_hw_enable_interrupts 832 > [ 54.804973] AR_SREV_9100 0 > [ 54.807663] ath9k_hw_enable_interrupts 848 > [ 54.811843] ath9k_hw_intrpend 762 > [ 54.815211] (AR_SREV_9340(ah) val 0 > [ 54.818684] ath9k_hw_intrpend 767 > [ 54.822078] ath_isr 603 > [ 54.824587] ath9k_hw_kill_interrupts 793 > [ 54.828601] ath9k_hw_enable_interrupts 821 > [ 54.832750] ath9k_hw_enable_interrupts 825 > [ 54.836916] ath9k_hw_enable_interrupts 832 > [ 54.841082] AR_SREV_9100 0 > [ 54.843772] ath9k_hw_enable_interrupts 848 > [ 54.843775] ath9k_hw_intrpend 762 > [ 54.851319] (AR_SREV_9340(ah) val 0 > [ 54.854793] ath9k_hw_intrpend 767 > [ 54.858185] ath_isr 603 > [ 54.860696] ath9k_hw_kill_interrupts 793 > [ 54.864776] ath9k_hw_enable_interrupts 821 > [ 54.867061] ath9k_hw_kill_interrupts 793 > [ 54.872870] ath9k_hw_enable_interrupts 825 > [ 54.877036] ath9k_hw_enable_interrupts 832 > [ 54.881202] AR_SREV_9100 0 > [ 54.883892] ath9k_hw_enable_interrupts 848 > [ 75.963129] INFO: rcu_sched detected stalls on CPUs/tasks: > [ 75.968602] 0-...: (2 GPs behind) idle=9d5/140000000000001/0 softirq=1103/1109 fqs=519 > [ 75.976675] (detected by 2, t=5274 jiffies, g=64, c=63, q=11) > [ 75.982485] Task dump for CPU 0: > [ 75.985696] ksoftirqd/0 R running task 0 3 2 0x00000002 > [ 75.992726] Call trace: > [ 75.995165] [] __switch_to+0xc4/0xd0 > [ 76.000281] [] 0xffffffc87b830500 > [ 139.059027] INFO: rcu_sched detected stalls on CPUs/tasks: > [ 139.064430] 0-...: (2 GPs behind) idle=9d5/140000000000001/0 softirq=1103/1109 fqs=2097 > [ 139.072593] (detected by 2, t=21049 jiffies, g=64, c=63, q=11) > [ 139.078489] Task dump for CPU 0: > [ 139.081700] ksoftirqd/0 R running task 0 3 2 0x00000002 > [ 139.088731] Call trace: > [ 139.091165] [] __switch_to+0xc4/0xd0 > [ 139.096285] [] 0xffffffc87b830500 > > >> > We are not seeing any issues on 32-bit ARM platform and X86 >> > platform. >> >> Can you collect a dmesg log (or, if the system hang means you can't >> collect that, a console log with "ignore_loglevel"), and "lspci -vv" >> output as root? That should have clues about whether the INTx got >> routed correctly. /proc/interrupts should also show whether we're >> receiving interrupts from the device. > > Here is the lspci output: > 00:00.0 PCI bridge: Xilinx Corporation Device d022 (prog-if 00 [Normal decode]) > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0 > Interrupt: pin A routed to IRQ 224 > Bus: primary=00, secondary=01, subordinate=0c, sec-latency=0 > I/O behind bridge: 00000000-00000fff > Memory behind bridge: e0000000-e00fffff > Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff > Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B- > PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- > Capabilities: [40] 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: [60] Express (v2) Root Port (Slot-), MSI 00 > DevCap: MaxPayload 256 bytes, PhantFunc 0 > ExtTag- RBE+ > 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 5GT/s, Width x2, ASPM not supported, Exit Latency L0s unlimited, L1 unlimited > ClockPM- Surprise- LLActRep- BwNot+ ASPMOptComp+ > LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk- > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- > LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- > RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible+ > RootCap: CRSVisible+ > RootSta: PME ReqID 0000, PMEStatus- PMEPending- > DevCap2: Completion Timeout: Range B, TimeoutDis+, LTR-, OBFF Not Supported ARIFwd- > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled ARIFwd- > LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis- > Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS- > Compliance De-emphasis: -6dB > LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1- > EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest- > Capabilities: [100 v1] Device Serial Number 00-00-00-00-00-00-00-00 > Capabilities: [10c 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: [128 v1] Vendor Specific Information: ID=1234 Rev=1 Len=018 > > 01:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network Adapter (rev 01) > Subsystem: Qualcomm Atheros Device 3112 > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0, Cache Line Size: 128 bytes > Interrupt: pin A routed to IRQ 224 > Region 0: Memory at e0000000 (64-bit, non-prefetchable) [size=128K] > [virtual] Expansion ROM at e0020000 [disabled] [size=64K] > Capabilities: [40] Power Management version 3 > 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 <1us, L1 <8us > ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 0.000W > 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 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <2us, 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, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- > DevCap2: Completion Timeout: Not Supported, TimeoutDis+, LTR-, OBFF Not Supported > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled > 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- > 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- NonFatalErr- > CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ > AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn- > 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: [300 v1] Device Serial Number 00-00-00-00-00-00-00-00 > Kernel driver in use: ath9k > > Here is the cat /proc/interrupts (after we do interface up): > > root@:~# ifconfig wlan0 up > [ 1548.926601] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready > root@Xilinx-ZCU102-2016_3:~# cat /proc/interrupts > CPU0 CPU1 CPU2 CPU3 > 1: 0 0 0 0 GICv2 29 Edge arch_timer > 2: 19873 20058 19089 17435 GICv2 30 Edge arch_timer > 12: 0 0 0 0 GICv2 156 Level zynqmp-dma > 13: 0 0 0 0 GICv2 157 Level zynqmp-dma > 14: 0 0 0 0 GICv2 158 Level zynqmp-dma > 15: 0 0 0 0 GICv2 159 Level zynqmp-dma > 16: 0 0 0 0 GICv2 160 Level zynqmp-dma > 17: 0 0 0 0 GICv2 161 Level zynqmp-dma > 18: 0 0 0 0 GICv2 162 Level zynqmp-dma > 19: 0 0 0 0 GICv2 163 Level zynqmp-dma > 20: 0 0 0 0 GICv2 164 Level Mali_GP_MMU, Mali_GP, Mali_PP0_MMU, Mali_PP0, Mali_PP1_MMU, Mali_PP1 > 30: 0 0 0 0 GICv2 95 Level eth0, eth0 > 206: 314 0 0 0 GICv2 49 Level cdns-i2c > 207: 40 0 0 0 GICv2 50 Level cdns-i2c > 209: 0 0 0 0 GICv2 150 Level nwl_pcie:misc > 214: 12 0 0 0 GICv2 47 Level ff0f0000.spi > 215: 0 0 0 0 GICv2 58 Level ffa60000.rtc > 216: 0 0 0 0 GICv2 59 Level ffa60000.rtc > 217: 0 0 0 0 GICv2 165 Level ahci-ceva[fd0c0000.ahci] > 218: 61 0 0 0 GICv2 81 Level mmc0 > 219: 0 0 0 0 GICv2 187 Level arm-smmu global fault > 220: 471 0 0 0 GICv2 53 Level xuartps > 223: 0 0 0 0 GICv2 154 Level fd4c0000.dma > 224: 3 0 0 0 dummy 1 Edge ath9k > 225: 0 0 0 0 GICv2 97 Level xhci-hcd:usb1 > > Regards, > Bharat -- Kalle Valo