On 07/04/2017 04:49 PM, Kalle Valo wrote:

Andrey Ryabinin [off-list ref] writes:

quoted

I occasionally hit WARN_ON_ONCE(work > weight); in napi_poll() on a
laptop with ath10k card.


[37207.593370] ------------[ cut here ]------------
[37207.593380] WARNING: CPU: 0 PID: 7 at ../net/core/dev.c:5274
net_rx_action+0x258/0x360
[37207.593381] Modules linked in: snd_hda_codec_realtek snd_soc_skl
snd_hda_codec_generic snd_soc_skl_ipc snd_soc_sst_ipc snd_soc_sst_dsp
snd_hda_ext_core snd_soc_sst_match snd_soc_core rtsx_pci_sdmmc
mmc_core snd_pcm_dmaengine x86_pkg_temp_thermal snd_hda_intel uvcvideo
kvm_intel videobuf2_vmalloc kvm snd_hda_codec snd_hwdep btusb
videobuf2_memops btintel snd_hda_core videobuf2_v4l2 bluetooth
irqbypass snd_pcm videobuf2_core crc32c_intel videodev mei_me mei
rtsx_pci intel_lpss_pci intel_lpss_acpi intel_vbtn intel_lpss mfd_core
tpm_tis intel_hid tpm_tis_core tpm efivarfs
[37207.593430] CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.11.7 #28
[37207.593432] Hardware name: Dell Inc. XPS 13 9360/0839Y6, BIOS 1.3.5 05/08/2017

What firmware and hardware versions exactly? The dmesg output when
ath10k loads is preferred. As you are using XPS 13 I'm guessing it's one
of QCA6174 family.

Yes it's qca6174.

$ dmesg |grep ath10
[    0.624828] ath10k_pci 0000:3a:00.0: enabling device (0000 -> 0002)
[    0.626370] ath10k_pci 0000:3a:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[    0.837862] ath10k_pci 0000:3a:00.0: qca6174 hw3.2 target 0x05030000 chip_id 0x00340aff sub 1a56:1535
[    0.837863] ath10k_pci 0000:3a:00.0: kconfig debug 0 debugfs 1 tracing 0 dfs 0 testmode 0
[    0.838388] ath10k_pci 0000:3a:00.0: firmware ver WLAN.RM.2.0-00180-QCARMSWPZ-1 api 4 features wowlan,ignore-otp,no-4addr-pad crc32 75dee6c5
[    0.900606] ath10k_pci 0000:3a:00.0: board_file api 2 bmi_id N/A crc32 19644295
[    3.020681] ath10k_pci 0000:3a:00.0: htt-ver 3.26 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
[    9.574087] ath10k_pci 0000:3a:00.0 wlp58s0: renamed from wlan0