Return-path: Received: from mail2.candelatech.com ([208.74.158.173]:34450 "EHLO mail2.candelatech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933980AbcI2Orm (ORCPT ); Thu, 29 Sep 2016 10:47:42 -0400 Message-ID: <57ED2982.4020002@candelatech.com> (sfid-20160929_164800_661366_38D528A6) Date: Thu, 29 Sep 2016 07:47:30 -0700 From: Ben Greear MIME-Version: 1.0 To: Matteo Grandi , LinuxWireless Mailing List Subject: Re: ath10k stuck on 6Mbps and spam syslog References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: stock ath10k firmware does not report tx-rate so the kernel always sees 6Mbps. I don't know about the splat..maybe post the function that is causing that? /home/matteo/linux-imx6/backports4.4.2-i2CAT/net/mac80211/util.c:2621 Thanks, Ben On 09/29/2016 06:39 AM, Matteo Grandi wrote: > Hello all, > > I'm struggling with a problem related on ath10k drivers: > I'm using a Compex WLE600V5-27 (802.11ac) miniPCIe card for some HT > tests needed for my thesis. > I'm using ath10k drivers for this card, and backports-4.4.2, in > particular the firmware-5.bin_10.2.4.70.54 because it seem to be the > more recent. > I've connected in mesh mode the WLE600V5 card with an 802.11n card > (using ath9k drivers) but looking at the station dump, the tx bitrate > is stuck on 6.0 Mbit/s for the ath10k. The ath9k one works well and > watch -n1 iw station dump > let me see changes of the tx rate and MCS on the ath9k during iperf > tests, but the ath10k stucks on 6.0 Mbit/s. > > Then something misterious (for me) happen while the channel > assignment: the syslog is spammed by this message: > > [17554.919459] ------------[ cut here ]------------ > [17554.919839] WARNING: CPU: 0 PID: 0 at > /home/matteo/linux-imx6/backports4.4.2-i2CAT/net/mac80211/util.c:2621 > ieee80211_calculate_rx_timestamp+0x204/0x278 [mac80211]() > [17554.919855] Modules linked in: arc4 sky2 ath10k_pci(O) > ath10k_core(O) ath(O) mac80211(O) cfg80211(O) compat(O) > [17554.919926] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W O > 3.14.48-g408ccb9 #4 > [17554.919990] [<80015050>] (unwind_backtrace) from [<80011330>] > (show_stack+0x10/0x14) > [17554.920038] [<80011330>] (show_stack) from [<806537dc>] > (dump_stack+0x80/0x90) > [17554.920074] [<806537dc>] (dump_stack) from [<8002c578>] > (warn_slowpath_common+0x6c/0x88) > [17554.920103] [<8002c578>] (warn_slowpath_common) from [<8002c630>] > (warn_slowpath_null+0x1c/0x24) > [17554.920377] [<8002c630>] (warn_slowpath_null) from [<7f089c74>] > (ieee80211_calculate_rx_timestamp+0x204/0x278 [mac80211]) > [17554.920826] [<7f089c74>] (ieee80211_calculate_rx_timestamp > [mac80211]) from [<7f07d724>] (ieee80211_rx_napi+0xcc/0x8d4 > [mac80211]) > [17554.921259] [<7f07d724>] (ieee80211_rx_napi [mac80211]) from > [<7f117fd0>] (ath10k_wmi_event_mgmt_rx+0x1f4/0x35c [ath10k_core]) > [17554.921540] [<7f117fd0>] (ath10k_wmi_event_mgmt_rx [ath10k_core]) > from [<7f10d844>] (ath10k_htc_rx_completion_handler+0x1cc/0x464 > [ath10k_core]) > [17554.921706] [<7f10d844>] (ath10k_htc_rx_completion_handler > [ath10k_core]) from [<7f157b4c>] (ath10k_pci_process_rx_cb+0x1ac/0x1fc > [ath10k_pci]) > [17554.921773] [<7f157b4c>] (ath10k_pci_process_rx_cb [ath10k_pci]) > from [<7f15b3ac>] (ath10k_ce_per_engine_service+0x5c/0x94 > [ath10k_pci]) > [17554.921835] [<7f15b3ac>] (ath10k_ce_per_engine_service > [ath10k_pci]) from [<7f15b464>] > (ath10k_ce_per_engine_service_any+0x80/0x88 [ath10k_pci]) > [17554.921892] [<7f15b464>] (ath10k_ce_per_engine_service_any > [ath10k_pci]) from [<7f15a6d8>] (ath10k_pci_tasklet+0x24/0x5c > [ath10k_pci]) > [17554.921946] [<7f15a6d8>] (ath10k_pci_tasklet [ath10k_pci]) from > [<800304c8>] (tasklet_action+0x80/0x110) > [17554.921979] [<800304c8>] (tasklet_action) from [<800306b8>] > (__do_softirq+0x10c/0x248) > [17554.922009] [<800306b8>] (__do_softirq) from [<80030a6c>] > (irq_exit+0xac/0xf4) > [17554.922042] [<80030a6c>] (irq_exit) from [<8000e904>] (handle_IRQ+0x44/0x90) > [17554.922072] [<8000e904>] (handle_IRQ) from [<800084f8>] > (gic_handle_irq+0x2c/0x5c) > [17554.922105] [<800084f8>] (gic_handle_irq) from [<80011e00>] > (__irq_svc+0x40/0x50) > [17554.922122] Exception stack(0x80917f18 to 0x80917f60) > [17554.922141] 7f00: > 80917f60 000d3334 > [17554.922166] 7f20: 5221e106 00000ff7 4d693c44 00000ff7 a7705010 > 80924060 00000001 a7705014 > [17554.922190] 7f40: 8096243d 80916000 00000017 80917f60 a6aaaaab > 80492940 60000013 ffffffff > [17554.922224] [<80011e00>] (__irq_svc) from [<80492940>] > (cpuidle_enter_state+0x50/0xe0) > [17554.922252] [<80492940>] (cpuidle_enter_state) from [<80492ac8>] > (cpuidle_idle_call+0xf8/0x148) > [17554.922281] [<80492ac8>] (cpuidle_idle_call) from [<8000ec48>] > (arch_cpu_idle+0x8/0x44) > [17554.922322] [<8000ec48>] (arch_cpu_idle) from [<80066648>] > (cpu_startup_entry+0xfc/0x140) > [17554.922362] [<80066648>] (cpu_startup_entry) from [<808c5b08>] > (start_kernel+0x360/0x36c) > [17554.922379] ---[ end trace 87d4775146813aed ]--- > [17555.943454] ------------[ cut here ]------------ > > that repeat continuously... > Forcing legacy bitrates doesn't change the situation. > > I made some measurements using iperf, please find it in attachment. > > Other info: > > root@Yazi:~# modinfo ath10k_pci > filename: > /lib/modules/3.14.48-g408ccb9/kernel/drivers/net/wireless/ath/ath10k/ath10k_pci.ko > firmware: ath10k/QCA9377/hw1.0/board.bin > firmware: ath10k/QCA9377/hw1.0/firmware-5.bin > firmware: ath10k/QCA6174/hw3.0/board-2.bin > firmware: ath10k/QCA6174/hw3.0/board.bin > firmware: ath10k/QCA6174/hw3.0/firmware-5.bin > firmware: ath10k/QCA6174/hw3.0/firmware-4.bin > firmware: ath10k/QCA6174/hw2.1/board-2.bin > firmware: ath10k/QCA6174/hw2.1/board.bin > firmware: ath10k/QCA6174/hw2.1/firmware-5.bin > firmware: ath10k/QCA6174/hw2.1/firmware-4.bin > firmware: ath10k/QCA988X/hw2.0/board-2.bin > firmware: ath10k/QCA988X/hw2.0/board.bin > firmware: ath10k/QCA988X/hw2.0/firmware-5.bin > firmware: ath10k/QCA988X/hw2.0/firmware-4.bin > firmware: ath10k/QCA988X/hw2.0/firmware-3.bin > firmware: ath10k/QCA988X/hw2.0/firmware-2.bin > firmware: ath10k/QCA988X/hw2.0/firmware.bin > license: Dual BSD/GPL > description: Driver support for Atheros QCA988X PCIe devices > author: Qualcomm Atheros > version: backported from Linux (v4.4.2-0-g1cb8570) using > backports v4.4.2-1-0-gbec4037 > srcversion: EBB3D4E36DE49B7EC8057D0 > alias: pci:v0000168Cd00000042sv*sd*bc*sc*i* > alias: pci:v0000168Cd00000040sv*sd*bc*sc*i* > alias: pci:v0000168Cd0000003Esv*sd*bc*sc*i* > alias: pci:v0000168Cd00000041sv*sd*bc*sc*i* > alias: pci:v0000168Cd0000003Csv*sd*bc*sc*i* > depends: ath10k_core,compat > vermagic: 3.14.48-g408ccb9 SMP mod_unload modversions ARMv7 p2v8 > parm: irq_mode:0: auto, 1: legacy, 2: msi (default: 0) (uint) > parm: reset_mode:0: auto, 1: warm only (default: 0) (uint) > > I don't know if it's only a problem of iw station dump that can't show > the tx rate, but the spammed syslog honestly warn me... > > How shall I check what's wrong and see the HT work? > > Thanks a lot! > > Matteo > -- Ben Greear Candela Technologies Inc http://www.candelatech.com