On 01/27/16 17:09, André Vitor wrote: > Hi all, > > I'm having trouble with driver r8xxxu. My device has a realtek usb wifi+bt > combo (0bda:0724) built-in. > I can connect to a wifi network but if I open something that uses > connections the driver stops working with a mac80211 crash message. > > OS used is Android-x86 with kernel 4.4.0. > > I'm also CC'ing the driver's author as I contacted him earlier. > > dmesg > > [ 34.641610] ------------[ cut here ]------------ > [ 34.641701] WARNING: CPU: 0 PID: 0 at > /home/andre64/m-x86/kernel/net/mac80211/rx.c:3619 > ieee80211_rx_napi+0x63/0x60f [mac80211]() > [ 34.641709] Modules linked in: hid_sensor_accel_3d hid_sensor_als > hid_sensor_magn_3d hid_sensor_incl_3d hid_sensor_rotation > hid_sensor_gyro_3d hid_sensor_trigger industrialio_triggered_buffer > kfifo_buf industrialio hid_sensor_iio_common hid_sensor_custom mac_hid > rtl8xxxu mac80211 cfg80211 atkbd pcspkr efivars snd_hda_codec_hdmi > snd_hda_codec_realtek snd_hda_codec_generic i2c_i801 lpc_ich snd_hda_intel > snd_hda_codec snd_hda_core snd_hwdep i915 drm_kms_helper drm fb_sys_fops > sysfillrect syscopyarea sysimgblt i2c_algo_bit hid_sensor_hub > hid_multitouch dw_dmac dw_dmac_core i2c_hid i2c_designware_platform > i2c_designware_core snd_soc_sst_acpi 8250_dw pwm_lpss_platform pwm_lpss > snd_soc_rt5640 snd_soc_rl6231 snd_soc_core snd_compress snd_pcm_dmaengine > snd_pcm snd_timer snd soundcore ac97_bus > [ 34.641852] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.0-android-x86+ > #2 > [ 34.641859] Hardware name: Zmax B10T/B10T, BIOS 5.6.5 11/22/2013 > [ 34.641867] 00000000 c14e8b20 00000000 c103bae0 f91a9291 00000e23 > da4467c0 f637c7f8 > [ 34.641887] f637c7e8 f637c420 c103bb58 00000009 00000000 f91a9291 > f553b501 00000000 > [ 34.641906] dee010b4 00000000 f82f815c f3f1e800 dee010b8 d48231d8 > f637c420 ffffffff > [ 34.641925] Call Trace: > [ 34.641944] [<c14e8b20>] ? dump_stack+0x45/0x65 > [ 34.641958] [<c103bae0>] ? warn_slowpath_common+0x8a/0x9f > [ 34.642030] [<f91a9291>] ? ieee80211_rx_napi+0x63/0x60f [mac80211] > [ 34.642042] [<c103bb58>] ? warn_slowpath_null+0xd/0x10 > [ 34.642114] [<f91a9291>] ? ieee80211_rx_napi+0x63/0x60f [mac80211] > [ 34.642178] [<f918d1d1>] ? ieee80211_tasklet_handler+0x4f/0x8e > [mac80211] > [ 34.642190] [<c103f04c>] ? tasklet_action+0x78/0x81 > [ 34.642201] [<c103ea69>] ? __do_softirq+0xb9/0x21c > [ 34.642213] [<c103e9b0>] ? __tasklet_hrtimer_trampoline+0x27/0x27 > [ 34.642225] [<c100467f>] ? do_softirq_own_stack+0x1a/0x1f > [ 34.642231] <IRQ> [<c103ecf8>] ? irq_exit+0x31/0x70 > [ 34.642278] [<c1004121>] ? do_IRQ+0x88/0x99 > [ 34.642292] [<c14f0a69>] ? common_interrupt+0x29/0x30 > [ 34.642306] [<c13b0678>] ? cpuidle_enter_state+0x16a/0x2a7 > [ 34.642319] [<c1067bb4>] ? cpu_startup_entry+0x197/0x280 > [ 34.642332] [<c1833a41>] ? start_kernel+0x35b/0x35e > [ 34.642340] ---[ end trace 2226f818bc03f025 ]--- > [ 34.844354] ------------[ cut here ]------------ This part looks suspicious to me - this is the NAPI stack spitting out slowpath warnings. Johannes, have you seen this kind of trace before? I am curious if this could be the Android mods that halts certain processing or if it's something I did wrong in the driver. Jes -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
