Hi. Just following up since I haven't seen a reply yet. The original e-
mail follows. I would like to get the eyes of a maintainer on this.
On Sun, 2025-01-19 at 21:24 -0500, Jared Van Bortel wrote:
> Hi all,
>
> I recently purchased a WallysTech DR7915 mPCIe Wi-Fi card (PCI ID
> 14c3:7915) for my ThinkPad W500. It is ostensibly based on the MT7915
> and MT7975 chips, using the mt7915e driver. I tried it on linux-stable
> 6.12.10 and was unable to get it to work. But it works fine on 6.1
> LTS.
>
> (As an aside - why is the latest firmware provided by mainline Linux
> version 20220929104113a, while OpenWRT is providing 20240429200502?)
>
> I bisected the issue to commit
> 9e81c2c7b9af6a5f160e0a9a7f009c37910402ee
> ("wifi: mt76: mt7915: enable per-phy led support"), which is included
> in
> kernel 6.3. This is what I get in dmesg before this commit (good
> behavior):
>
> [ 34.976575] mt7915e 0000:03:00.0: HW/SW Version: 0x8a108a10, Build
> Time: 20220929104113a
> [ 34.990089] mt7915e 0000:03:00.0: WM Firmware Version: ____000000,
> Build Time: 20220929104145
> [ 35.012664] mt7915e 0000:03:00.0: WA Firmware Version: DEV_000000,
> Build Time: 20220929104205
> [ 35.178619] mt7915e 0000:03:00.0 wlp3s0: renamed from wlan0
> [ 44.588223] wlan0: authenticate with XX:XX:XX:XX:XX:XX
> [ 44.598831] wlan0: send auth to XX:XX:XX:XX:XX:XX (try 1/3)
> [ 44.601589] wlan0: authenticate with XX:XX:XX:XX:XX:XX
> [ 44.601594] wlan0: send auth to XX:XX:XX:XX:XX:XX (try 1/3)
> [ 44.611058] wlan0: authenticate with XX:XX:XX:XX:XX:XX
> [ 44.611064] wlan0: send auth to XX:XX:XX:XX:XX:XX (try 1/3)
> [ 44.612714] wlan0: authenticated
>
> This is what I get after that commit (bad behavior):
>
> [ 37.507795] mt7915e 0000:03:00.0: HW/SW Version: 0x8a108a10, Build
> Time: 20220929104113a
> [ 37.521157] mt7915e 0000:03:00.0: WM Firmware Version: ____000000,
> Build Time: 20220929104145
> [ 37.541817] mt7915e 0000:03:00.0: WA Firmware Version: DEV_000000,
> Build Time: 20220929104205
> [ 37.707782] mt7915e 0000:03:00.0 wlp3s0: renamed from wlan0
> [ 42.984991] pcieport 0000:00:1c.1: pciehp: Slot(1-2): Link Down
> [ 42.984999] pcieport 0000:00:1c.1: pciehp: Slot(1-2): Card not
> present
> [ 64.651072] mt7915e 0000:03:00.0: Message 00001eed (seq 9) timeout
> [ 85.131081] mt7915e 0000:03:00.0: Message 000007ed (seq 11) timeout
> [ 85.132693] mt7915e 0000:03:00.0 wlp3s0f0: renamed from wlan0
> [ 105.614421] mt7915e 0000:03:00.0: Message 000007ed (seq 1) timeout
> [ 107.701101] mt7915e 0000:03:00.0: Timeout for initializing firmware
> [ 107.701154] mt7915e 0000:03:00.0: Failed to exit mcu
> [ 107.844646] pci 0000:03:00.0: Removing from iommu group 6
> [ 107.844679] pcieport 0000:00:1c.1: pciehp: Slot(1-2): Card present
> [ 109.541013] pcieport 0000:00:1c.1: pciehp: Slot(1-2): No link
> [ 109.541024] pcieport 0000:00:1c.1: pciehp: Slot(1-2): Card present
> [ 111.234338] pcieport 0000:00:1c.1: pciehp: Slot(1-2): No link
>
> On kernel 6.12.10, this failure leads to a page fault, sometimes
> immediately:
>
> [ 127.807503] [ T73] mt7915e 0000:03:00.0: Message 00001eed (seq
> 7) timeout
> [ 127.914244] [ T73] BUG: unable to handle page fault for
> address: ffffabc5c0628ff0
> [ 127.914294] [ T73] #PF: supervisor write access in kernel mode
> [ 127.914329] [ T73] #PF: error_code(0x0002) - not-present page
> [ 127.914363] [ T73] PGD 100000067 P4D 100000067 PUD 100209067
> PMD 103e7f067 PTE 0
> [ 127.914406] [ T73] Oops: Oops: 0002 [#1] PREEMPT SMP NOPTI
> [ 127.914429] [ T73] CPU: 0 UID: 0 PID: 73 Comm: kworker/u16:6
> Kdump: loaded Tainted: G I 6.12.10-arch1-1 #1
> ac0cff2c6581af0a10f6e278cbc98026cc1e3dec
> [ 127.914489] [ T73] Tainted: [I]=FIRMWARE_WORKAROUND
> [ 127.914510] [ T73] Hardware name: LENOVO 40612ZU/40612ZU, BIOS
> 6FET93WW (3.23 ) 10/12/2012
> [ 127.914538] [ T73] Workqueue: mt76 mt7915_mac_reset_work
> [mt7915e]
> [ 127.914578] [ T73] RIP: 0010:mt76_dma_rx_fill+0x157/0x4c0
> [mt76]
> [ 127.914615] [ T73] Code: 8b 54 24 40 85 c0 4c 8b 44 24 18 4c 8b
> 4c 24 20 4c 8b 5c 24 28 0f 88 2a 03 00 00 c1 e0 10 44 89 ce 44 09 d8
> 81 ce 00 01 00 00 <45> 89 34 24 41 89 44 24 08 41 89 74 24 04 41 c7 44
> 24 0c 00 00 00
> [ 127.914677] [ T73] RSP: 0018:ffffabc5c03afcf8 EFLAGS: 00010246
> [ 127.914699] [ T73] RAX: 0000000000000000 RBX: ffff9b694630d800
> RCX: 0000000000000000
> [ 127.914726] [ T73] RDX: 0000000000000000 RSI: 0000000006c00000
> RDI: 0000000000000000
> [ 127.914753] [ T73] RBP: ffff9b6947ef45d8 R08: ffff9b6948210000
> R09: 0000000006c00000
> [ 127.914779] [ T73] R10: 00000000000006c0 R11: 0000000000000000
> R12: ffffabc5c0628ff0
> [ 127.914806] [ T73] R13: ffff9b69c630d800 R14: 00000000ffd15800
> R15: 0000000000000000
> [ 127.914833] [ T73] FS: 0000000000000000(0000)
> GS:ffff9b6a77c00000(0000) knlGS:0000000000000000
> [ 127.914868] [ T73] CS: 0010 DS: 0000 ES: 0000 CR0:
> 0000000080050033
> [ 127.914891] [ T73] CR2: ffffabc5c0628ff0 CR3: 000000004b622000
> CR4: 00000000000426f0
> [ 127.914918] [ T73] Call Trace:
> [ 127.914930] [ T73] <TASK>
> [ 127.914942] [ T73] ? __die_body.cold+0x19/0x27
> [ 127.914967] [ T73] ? page_fault_oops+0x15a/0x2d0
> [ 127.914992] [ T73] ? search_bpf_extables+0x5f/0x80
> [ 127.915016] [ T73] ? exc_page_fault+0x18a/0x190
> [ 127.915035] [ T73] ? asm_exc_page_fault+0x26/0x30
> [ 127.915056] [ T73] ? mt76_dma_rx_fill+0x157/0x4c0 [mt76
> 8ebc1f1034fdcf4b82c21f7f79b6854fd3dd0e30]
> [ 127.915096] [ T73] ? mt76_dma_rx_fill+0x1ef/0x4c0 [mt76
> 8ebc1f1034fdcf4b82c21f7f79b6854fd3dd0e30]
> [ 127.915137] [ T73] ? mt76_dma_rx_cleanup.part.0+0x5e/0x160
> [mt76 8ebc1f1034fdcf4b82c21f7f79b6854fd3dd0e30]
> [ 127.915185] [ T73] ? mt76_dma_rx_cleanup.part.0+0x6c/0x160
> [mt76 8ebc1f1034fdcf4b82c21f7f79b6854fd3dd0e30]
> [ 127.915233] [ T73] mt7915_dma_reset+0x1e1/0x230 [mt7915e
> 7945e3c7bfde237a78fef4a04127eb6221537724]
> [ 127.915280] [ T73] mt7915_mac_reset_work+0x67e/0xcd0 [mt7915e
> 7945e3c7bfde237a78fef4a04127eb6221537724]
> [ 127.915323] [ T73] process_one_work+0x17b/0x330
> [ 127.915343] [ T73] worker_thread+0x2ce/0x3f0
> [ 127.915365] [ T73] ? __pfx_worker_thread+0x10/0x10
> [ 127.915389] [ T73] kthread+0xcf/0x100
> [ 127.915406] [ T73] ? __pfx_kthread+0x10/0x10
> [ 127.915428] [ T73] ret_from_fork+0x31/0x50
> [ 127.915449] [ T73] ? __pfx_kthread+0x10/0x10
> [ 127.915470] [ T73] ret_from_fork_asm+0x1a/0x30
> [ 127.915494] [ T73] </TASK>
> [ 127.915507] [ T73] Modules linked in: mt7915e mt76_connac_lib
> mt76 mac80211 libarc4 cfg80211 snd_seq_dummy snd_hrtimer snd_seq
> snd_seq_device ip6t_REJECT nf_reject_ipv6 ipt_REJECT xt_multiport
> xt_cgroup xt_mark xt_owner xt_tcpudp nft_compat amdgpu amdxcp drm_exec
> gpu_sched nft_masq drm_buddy nft_ct nft_reject_ipv4 nf_reject_ipv4
> nft_reject act_csum cls_u32 sch_htb nft_chain_nat nf_nat nf_conntrack
> nf_defrag_ipv6 nf_defrag_ipv4 nf_tables bridge stp llc btusb btrtl
> btintel btbcm btmtk bluetooth crc16 joydev mousedev snd_hda_codec_hdmi
> snd_hda_codec_conexant kvm_intel iTCO_wdt snd_hda_codec_generic
> intel_pmc_bxt radeon snd_hda_intel mei_wdt iTCO_vendor_support
> snd_intel_dspcfg kvm i2c_algo_bit snd_intel_sdw_acpi pcmcia i2c_i801
> drm_suballoc_helper snd_hda_codec drm_ttm_helper i2c_smbus
> snd_hda_core sha512_ssse3 ttm i2c_mux sha1_ssse3 snd_hwdep
> yenta_socket psmouse acpi_cpufreq pcspkr e1000e r592 pcmcia_rsrc
> pktcdvd mei_me snd_pcm memstick ptp drm_display_helper pcmcia_core
> lpc_ich intel_agp snd_timer mei pps_core cec intel_gtt
> [ 127.915596] [ T73] think_lmi mac_hid firmware_attributes_class
> wmi_bmof coretemp thinkpad_acpi platform_profile sparse_keymap rfkill
> snd soundcore video wmi sg crypto_user dm_mod loop nfnetlink ip_tables
> x_tables btrfs blake2b_generic libcrc32c crc32c_generic serio_raw
> sdhci_pci xor atkbd raid6_pq libps2 vivaldi_fmap firewire_ohci cqhci
> sr_mod sdhci firewire_core sha256_ssse3 mmc_core cdrom i8042 crc_itu_t
> serio
> [ 127.916035] [ T73] CR2: ffffabc5c0628ff0
>
>
> It would be nice to be able to use this card on a more recent kernel.
> I
> can assist with debugging and testing, assuming I haven't somehow
> gotten
> a defective unit - but I don't think that would really explain why I
> can
> use it just fine on 6.1 LTS.
>
> Thanks,
> Jared Van Bortel
