[ 43.378891] ------------[ cut here ]------------ [ 43.379505] WARNING: CPU: 3 PID: 827 at lib/dma-debug.c:1169 check_for_stack+0x94/0xe0() [ 43.380100] ehci-pci 0000:00:02.1: DMA-API: device driver maps memory from stack [addr=ffff8800bc6dfa3c] [ 43.380673] Modules linked in: ... mt7601u(+) mac80211 ... cfg80211 rfkill ... [ 43.384779] CPU: 3 PID: 827 Comm: systemd-udevd Not tainted 4.2.0-0.rc6.git0.1.fc24.x86_64+debug #1 ... [ 43.388131] Call Trace: [ 43.388776] [<ffffffff81868d8e>] dump_stack+0x4c/0x65 [ 43.389406] [<ffffffff810ab406>] warn_slowpath_common+0x86/0xc0 [ 43.390044] [<ffffffff810ab495>] warn_slowpath_fmt+0x55/0x70 [ 43.390668] [<ffffffff81871e26>] ? _raw_spin_unlock_irqrestore+0x36/0x60 [ 43.391306] [<ffffffff81450044>] check_for_stack+0x94/0xe0 [ 43.391943] [<ffffffff8145062b>] debug_dma_map_page+0xfb/0x140 [ 43.392558] [<ffffffff81614eb8>] usb_hcd_map_urb_for_dma+0x608/0x760 [ 43.393199] [<ffffffff8161548d>] usb_hcd_submit_urb+0x1cd/0xab0 [ 43.393815] [<ffffffff8110315f>] ? save_trace+0x3f/0xc0 [ 43.394407] [<ffffffff81106edd>] ? mark_held_locks+0x7d/0xb0 [ 43.395016] [<ffffffff8110ddd5>] ? __raw_spin_lock_init+0x25/0x60 [ 43.395608] [<ffffffff81103b73>] ? lockdep_init_map+0x73/0x640 [ 43.396212] [<ffffffff81107039>] ? trace_hardirqs_on_caller+0x129/0x1b0 [ 43.396826] [<ffffffff8161707c>] usb_submit_urb+0x3fc/0x5a0 [ 43.397414] [<ffffffff81617947>] usb_start_wait_urb+0x77/0x180 [ 43.398013] [<ffffffff8124a83e>] ? __kmalloc+0x28e/0x360 [ 43.398598] [<ffffffff81617b2c>] usb_control_msg+0xdc/0x130 [ 43.399214] [<ffffffffa0850510>] mt7601u_vendor_request+0xf0/0x310 [mt7601u] [ 43.399819] [<ffffffff8186f4dc>] ? __mutex_unlock_slowpath+0xbc/0x180 [ 43.400419] [<ffffffffa08507b9>] mt7601u_rr+0x59/0x280 [mt7601u] [ 43.401039] [<ffffffff8161b738>] ? usb_autosuspend_device+0x28/0x30 [ 43.401631] [<ffffffffa0857c93>] mt7601u_wait_asic_ready+0x23/0x60 [mt7601u] [ 43.402244] [<ffffffffa0850ac0>] mt7601u_probe+0xe0/0x220 [mt7601u] [ 43.402836] [<ffffffff8161c03b>] usb_probe_interface+0x1bb/0x2e0 [ 43.403413] [<ffffffff81579f26>] driver_probe_device+0x1f6/0x450 [ 43.404004] [<ffffffff8157a214>] __driver_attach+0x94/0xa0 [ 43.404570] [<ffffffff8157a180>] ? driver_probe_device+0x450/0x450 [ 43.405159] [<ffffffff815778f3>] bus_for_each_dev+0x73/0xc0 [ 43.405732] [<ffffffff815796fe>] driver_attach+0x1e/0x20 [ 43.406325] [<ffffffff8157922e>] bus_add_driver+0x1ee/0x280 [ 43.406929] [<ffffffff8157b0a0>] driver_register+0x60/0xe0 [ 43.407503] [<ffffffff8161a87d>] usb_register_driver+0xad/0x160 [ 43.408100] [<ffffffffa086e000>] ? 0xffffffffa086e000 [ 43.408674] [<ffffffffa086e01e>] mt7601u_driver_init+0x1e/0x20 [mt7601u] [ 43.409278] [<ffffffff81002123>] do_one_initcall+0xb3/0x200 [ 43.409870] [<ffffffff8124ac65>] ? kmem_cache_alloc_trace+0x355/0x380 [ 43.410435] [<ffffffff81867c37>] ? do_init_module+0x28/0x1e9 [ 43.411014] [<ffffffff81867c6f>] do_init_module+0x60/0x1e9 [ 43.411558] [<ffffffff81154167>] load_module+0x21f7/0x28d0 [ 43.412112] [<ffffffff8114f600>] ? m_show+0x1b0/0x1b0 [ 43.412638] [<ffffffff81026d79>] ? sched_clock+0x9/0x10 [ 43.413175] [<ffffffff810e6ddc>] ? local_clock+0x1c/0x20 [ 43.413681] [<ffffffff811549b8>] SyS_init_module+0x178/0x1c0 [ 43.414204] [<ffffffff8187282e>] entry_SYSCALL_64_fastpath+0x12/0x76 [ 43.414695] ---[ end trace 0c0ff6cd25624338 ]---
Fixed already by bed429e1ae8b7ee207e01f3aa60dcc0d06a8ed4d in wireless-drivers-next.git tree. https://git.kernel.org/cgit/linux/kernel/git/kvalo/wireless-drivers-next.git/commit/?id=bed429e1ae8b7ee207e01f3aa60dcc0d06a8ed4d
Patched with all four: 0001-mt7601u-fix-dma-from-stack-address.patch 0002-mt7601u-use-correct-ieee80211_rx-variant.patch 0003-mt7601u-fix-tx-status-reporting-contexts.patch 0004-mt7601u-lock-out-rx-path-and-tx-status-reporting.patch 4.2.0-0.rc6.git0.3.fc24.x86_64 runs OK. Will this reach 4.2.0? dmesg | grep mt76 [ 40.931725] mt7601u 1-3:1.0: ASIC revision: 76010001 MAC revision: 76010500 [ 40.979553] mt7601u 1-3:1.0: Warning: unsupported EEPROM version 0d [ 40.979758] mt7601u 1-3:1.0: EEPROM ver:0d fae:00 [ 41.217464] usbcore: registered new interface driver mt7601u [ 41.230251] mt7601u 1-3:1.0 wlp0s2f1u3: renamed from wlan0 suspend/resume [ 224.733321] mt7601u 1-3:1.0: Error: MCU response pre-completed! [ 224.759939] mt7601u 1-3:1.0: Warning: unsupported EEPROM version 0d [ 224.759941] mt7601u 1-3:1.0: EEPROM ver:0d fae:00 https://github.com/kuba-moo/mt7601u/blob/master/mcu.c#L138 if (dev->mcu.resp_cmpl.done) dev_err(dev->dev, "Error: MCU response pre-completed!\n"); kuba-moo, what is this "Error: MCU response pre-completed!", occurs during resume?