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