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Subject[PATCH v2] rtw88: 8822ce: fix wifi disconnect after S3/S4 on HONOR laptop
Date
The laptop's wifi disconnect after the laptop HONOR MagicBook 14
sleep to S3/S4 and wake up.

The dmesg of kernel report:
"[ 99.990168] pcieport 0000:00:01.2: can't change power state from D3hot
to D0 (config space inaccessible)
[ 99.990176] ACPI: EC: interrupt unblocked
[ 99.993334] rtw_pci 0000:01:00.0: can't change power state from D3hot
to D0 (config space inaccessible)
......
[ 102.133500] rtw_pci 0000:01:00.0: mac power on failed
[ 102.133503] rtw_pci 0000:01:00.0: failed to power on mac
[ 102.133505] ------------[ cut here ]------------
[ 102.133506] Hardware became unavailable upon resume. This could be a
software issue prior to suspend or a hardware issue.
[ 102.133569] WARNING: CPU: 4 PID: 5612 at net/mac80211/util.c:2232
ieee80211_reconfig+0x9b/0x1490 [mac80211]
[ 102.133570] Modules linked in: ccm rfcomm uvcvideo videobuf2_vmalloc
videobuf2_memops videobuf2_v4l2 videobuf2_common videodev mc cmac bnep
btusb btrtl btbcm btintel edac_mce_amd bluetooth kvm_amd ecdh_generic
ecc kvm nls_iso8859_1 rtwpci rtw88 crct10dif_pclmul crc32_pclmul mac80211
ghash_clmulni_intel aesni_intel snd_hda_codec_realtek crypto_simd huawei_wmi
snd_hda_codec_generic cryptd cfg80211 wmi_bmof serio_raw sparse_keymap
ledtrig_audio sp5100_tco glue_helper joydev snd_hda_codec_hdmi snd_hda_intel
snd_intel_dspcfg wdat_wdt snd_hda_codec snd_hda_core pcspkr snd_hwdep snd_pcm
efi_pstore snd_timer libarc4 k10temp snd soundcore snd_pci_acp3x ccp mac_hid
binfmt_misc ip_tables x_tables autofs4 amdgpu amd_iommu_v2 gpu_sched
i2c_algo_bit ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops
usbmouse cec nvme hid_generic i2c_piix4 usbhid nvme_core drm wmi video
[ 102.133617] CPU: 4 PID: 5612 Comm: kworker/u32:16 Not tainted 5.7.7-amd64-desktop-8822 #3
[ 102.133618] Hardware name: HUAWEI NBLL-WXX9/NBLL-WXX9-PCB, BIOS 1.06 09/29/2020
[ 102.133623] Workqueue: events_unbound async_run_entry_fn
[ 102.133651] RIP: 0010:ieee80211_reconfig+0x9b/0x1490 [mac80211]
[ 102.133654] Code: 31 db e8 e8 fb 27 c2 41 c6 85 34 05 00 00 00 4c 89 ef e8 38
56 fc ff 89 45 b8 85 c0 74 4c 48 c7 c7 d0 0c 09 c1 e8 01 e0 25 c2 <0f> 0b 4c
89 ef e8 2b d1 ff ff e9 02 03 00 00 80 7d 9f 00 0f 85 1d
[ 102.133655] RSP: 0018:ffffbe52c059fd08 EFLAGS: 00010286
[ 102.133657] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000007
[ 102.133658] RDX: 0000000000000007 RSI: 0000000000000096 RDI: ffff9d573f519cc0
[ 102.133659] RBP: ffffbe52c059fd80 R08: ffffffffffd96245 R09: 000000000002cb80
[ 102.133660] R10: 000000016989e54c R11: 000000000002a360 R12: ffff9d5731f50300
[ 102.133661] R13: ffff9d5731f50800 R14: ffff9d5731f504c8 R15: ffffffff8463fbef
[ 102.133664] FS: 0000000000000000(0000) GS:ffff9d573f500000(0000) knlGS:0000000000000000
[ 102.133665] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 102.133666] CR2: 0000000000000000 CR3: 000000033320a000 CR4: 0000000000340ee0
[ 102.133667] Call Trace:
[ 102.133673] ? enqueue_entity+0xe3/0x680
[ 102.133705] ieee80211_resume+0x55/0x70 [mac80211]
[ 102.133729] wiphy_resume+0x84/0x130 [cfg80211]
[ 102.133752] ? addresses_show+0xa0/0xa0 [cfg80211]
[ 102.133757] dpm_run_callback+0x5b/0x150
[ 102.133760] device_resume+0xad/0x1f0
[ 102.133762] async_resume+0x1d/0x30
[ 102.133764] async_run_entry_fn+0x3e/0x170
[ 102.133768] process_one_work+0x1ab/0x380
[ 102.133771] worker_thread+0x37/0x3b0
[ 102.133774] kthread+0x120/0x140
[ 102.133776] ? create_worker+0x1b0/0x1b0
[ 102.133778] ? kthread_park+0x90/0x90
[ 102.133782] ret_from_fork+0x22/0x40
[ 102.133785] ---[ end trace 46229bfd3a4273be ]---
[ 102.134137] ------------[ cut here ]------------
[ 102.134141] wlp1s0: Failed check-sdata-in-driver check, flags: 0x0
[ 102.134195] WARNING: CPU: 0 PID: 5612 at net/mac80211/driver-ops.h:19
drv_remove_interface+0xfe/0x110 [mac80211]"

When try to pointer the driver.pm to NULL, the problem is fixed.
It makes the sleep and wake procedure expected when pm's ops not NULL.

By `git blame` command, I know that the assignment of .driver.pm =
RTW_PM_OPS was in commit 44bc17f7f5b3 ("rtw88: support wowlan feature for
8822c"), and another
commit 7dc7c41607d1 ("rtw88: avoid unused function warnings")
pointed out rtw_pci_resume() and rtw_pci_suspend() are not used at
all.

So I think it's safe to remove them.

Fixes: 7dc7c41607d1 ("rtw88: avoid unused function warnings")
Fixes: 44bc17f7f5b3 ("rtw88: support wowlan feature for 8822c")

Signed-off-by: Hao Chen <chenhaoa@uniontech.com>
---
drivers/net/wireless/realtek/rtw88/rtw8822ce.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822ce.c b/drivers/net/wireless/realtek/rtw88/rtw8822ce.c
index 3845b1333dc3..4c063192f801 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822ce.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822ce.c
@@ -25,7 +25,6 @@ static struct pci_driver rtw_8822ce_driver = {
.id_table = rtw_8822ce_id_table,
.probe = rtw_pci_probe,
.remove = rtw_pci_remove,
- .driver.pm = &rtw_pm_ops,
.shutdown = rtw_pci_shutdown,
};
module_pci_driver(rtw_8822ce_driver);
--
2.20.1


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