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Date: Fri, 14 Jun 2013 00:24:11 +0200 From: Johannes Stezenbach <js@...21.net> To: Johannes Berg <johannes@...solutions.net> Cc: netdev@...r.kernel.org, mcgrof@...not-panic.com, kvalo@...rom.com, adrian.chadd@...il.com, romieu@...zoreil.com Subject: Re: [PATCH] alx: add a simple AR816x/AR817x device driver On Wed, Jun 12, 2013 at 10:33:22PM +0200, Johannes Berg wrote: > This is a very simple driver, based on the original vendor > driver that Qualcomm/Atheros published/submitted previously. > I have heavily reworked the driver to be a bit saner, and > in the process removed a number of features: TSO/GSO, VLAN > acceleration and multiqueue. I've also ruthlessly stripped > things not useful to me, e.g. register access support. > > Right now it only supports a single TX and RX queue and no > special features other than checksum offload. > > Signed-off-by: Johannes Berg <johannes@...solutions.net> I tried your driver with v3.9.6 and got this on boot: [ 0.939189] INFO: trying to register non-static key. [ 0.939787] the code is fine but needs lockdep annotation. [ 0.940387] turning off the locking correctness validator. [ 0.940992] Pid: 1, comm: swapper/0 Not tainted 3.9.6 #2 [ 0.941589] Call Trace: [ 0.942179] [<ffffffff8108cead>] __lock_acquire.isra.24+0x710/0xa47 [ 0.942781] [<ffffffff8108d87f>] lock_acquire+0xc0/0x142 [ 0.943379] [<ffffffff814414b1>] ? alx_write_phy_dbg+0x25/0x69 [ 0.943980] [<ffffffff8108b624>] ? lock_release_holdtime.part.18+0x93/0x98 [ 0.944587] [<ffffffff816620ae>] _raw_spin_lock+0x3e/0x70 [ 0.945193] [<ffffffff814414b1>] ? alx_write_phy_dbg+0x25/0x69 [ 0.945798] [<ffffffff814414b1>] alx_write_phy_dbg+0x25/0x69 [ 0.946399] [<ffffffff81441bcc>] alx_reset_phy+0x78/0x223 [ 0.946991] [<ffffffff814424b5>] ? alx_phy_configured+0x1a/0x7f [ 0.947577] [<ffffffff8144000b>] alx_probe+0x30f/0x635 [ 0.948162] [<ffffffff812d54a8>] pci_device_probe+0x6e/0xb2 [ 0.948757] [<ffffffff813efab0>] driver_probe_device+0x11a/0x2ef [ 0.949350] [<ffffffff813efd23>] __driver_attach+0x61/0x83 [ 0.949936] [<ffffffff813efcc2>] ? __device_attach+0x3d/0x3d [ 0.950513] [<ffffffff813ede40>] bus_for_each_dev+0x7d/0x87 [ 0.951089] [<ffffffff813ef4e8>] driver_attach+0x1e/0x20 [ 0.951661] [<ffffffff813ef0b6>] bus_add_driver+0x136/0x23e [ 0.952228] [<ffffffff81f0cf63>] ? atl1e_init_module+0x1b/0x1b [ 0.952782] [<ffffffff813f0268>] driver_register+0x8c/0xfd [ 0.953321] [<ffffffff81f0cf63>] ? atl1e_init_module+0x1b/0x1b [ 0.953855] [<ffffffff812d5319>] __pci_register_driver+0x5d/0x60 [ 0.954387] [<ffffffff81f0cf7c>] alx_driver_init+0x19/0x1b [ 0.954906] [<ffffffff8100026c>] do_one_initcall+0x7f/0x13e [ 0.955420] [<ffffffff81ee0e96>] kernel_init_freeable+0x115/0x196 [ 0.955922] [<ffffffff81ee0738>] ? do_early_param+0x88/0x88 [ 0.956436] [<ffffffff81648389>] ? rest_init+0xbd/0xbd [ 0.956955] [<ffffffff81648397>] kernel_init+0xe/0xd6 [ 0.957472] [<ffffffff8166962c>] ret_from_fork+0x7c/0xb0 [ 0.958000] [<ffffffff81648389>] ? rest_init+0xbd/0xbd and after "ifconfig eth0 up": [ 539.482153] alx 0000:03:00.0: irq 45 for MSI/MSI-X [ 539.482249] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 539.483169] alx 0000:03:00.0 eth0: NIC Up: 1 Gbps Full [ 539.483354] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 544.801438] ------------[ cut here ]------------ [ 544.801458] WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0x19b/0x201() [ 544.801462] Hardware name: System Product Name [ 544.801464] NETDEV WATCHDOG: eth0 (alx): transmit queue 0 timed out [ 544.801466] Modules linked in: ath9k_htc ath9k_common ath9k_hw kvm_intel ath mac80211 kvm cfg80211 ehci_pci ehci_hcd xhci_hcd [ 544.801483] Pid: 0, comm: swapper/2 Not tainted 3.9.6 #2 [ 544.801486] Call Trace: [ 544.801488] <IRQ> [<ffffffff8155e600>] ? dev_watchdog+0x118/0x201 [ 544.801499] [<ffffffff8103f68c>] warn_slowpath_common+0x81/0x9b [ 544.801513] [<ffffffff8103f6f2>] warn_slowpath_fmt+0x4c/0x4e [ 544.801525] [<ffffffff8155e683>] dev_watchdog+0x19b/0x201 [ 544.801530] [<ffffffff8155e4e8>] ? dev_graft_qdisc+0x6b/0x6b [ 544.801536] [<ffffffff8104cbb1>] call_timer_fn+0xa1/0x1b7 [ 544.801540] [<ffffffff8104cb15>] ? call_timer_fn+0x5/0x1b7 [ 544.801545] [<ffffffff8104d4eb>] run_timer_softirq+0x1f2/0x253 [ 544.801550] [<ffffffff8155e4e8>] ? dev_graft_qdisc+0x6b/0x6b [ 544.801555] [<ffffffff81046902>] __do_softirq+0x106/0x28e [ 544.801560] [<ffffffff81046bb4>] irq_exit+0x66/0xaa [ 544.801572] [<ffffffff8166b0ad>] smp_apic_timer_interrupt+0x8a/0x98 [ 544.801585] [<ffffffff8166a2f2>] apic_timer_interrupt+0x72/0x80 [ 544.801587] <EOI> [<ffffffff814cdc09>] ? cpuidle_wrap_enter+0x4f/0x87 [ 544.801602] [<ffffffff814cd3f5>] cpuidle_enter_tk+0x10/0x12 [ 544.801618] [<ffffffff814cd7d1>] cpuidle_enter_state+0x13/0x39 [ 544.801626] [<ffffffff814cd8f6>] cpuidle_idle_call+0xff/0x1f5 [ 544.801634] [<ffffffff8100920c>] cpu_idle+0xb5/0xf3 [ 544.801643] [<ffffffff816519cc>] start_secondary+0x266/0x26a [ 544.801650] ---[ end trace bf3b629fdf5b91ce ]--- [ 544.803253] alx 0000:03:00.0 eth0: NIC Up: 1 Gbps Full lspci -vvvn: 03:00.0 Ethernet controller: Qualcomm Atheros AR8161 Gigabit Ethernet (rev 08) 03:00.0 0200: 1969:1091 (rev 08) Subsystem: 1043:8507 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 45 Region 0: Memory at f7c00000 (64-bit, non-prefetchable) [size=256K] Region 2: I/O ports at e000 [size=128] 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: [58] Express (v1) Endpoint, MSI 00 DevCap: MaxPayload 4096 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited 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 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 unlimited, L1 unlimited ClockPM+ Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- Capabilities: [c0] MSI: Enable+ Count=1/16 Maskable+ 64bit+ Address: 00000000fee0f00c Data: 41e1 Masking: 0000fffe Pending: 00000000 Capabilities: [d8] MSI-X: Enable- Count=16 Masked- Vector table: BAR=0 offset=00002000 PBA: BAR=0 offset=00003000 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: [180 v1] Device Serial Number ff-* Kernel driver in use: alx grep eth0 /proc/interrupts 45: 0 0 0 0 PCI-MSI-edge eth0 Any idea what to try? Thanks, Johannes -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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