wifi: rtw88: use ieee80211_purge_tx_queue() to purge TX skb

In the Linux kernel, the following vulnerability has been resolved:

wifi: rtw88: use ieee80211_purge_tx_queue() to purge TX skb

When removing kernel modules by:

rmmod rtw88_8723cs rtw88_8703b rtw88_8723x rtw88_sdio rtw88_core

Driver uses skb_queue_purge() to purge TX skb, but not report tx status

causing "Have pending ack frames!" warning. Use ieee80211_purge_tx_queue()

to correct this.

Since ieee80211_purge_tx_queue() doesn't take locks, to prevent racing

between TX work and purge TX queue, flush and destroy TX work in advance.

wlan0: deauthenticating from aa:f5:fd:60:4c:a8 by local

choice (Reason: 3=DEAUTH_LEAVING)

------------[ cut here ]------------

Have pending ack frames!

WARNING: CPU: 3 PID: 9232 at net/mac80211/main.c:1691

ieee80211_free_ack_frame+0x5c/0x90 [mac80211]

CPU: 3 PID: 9232 Comm: rmmod Tainted: G C

6.10.1-200.fc40.aarch64 #1

Hardware name: pine64 Pine64 PinePhone Braveheart

(1.1)/Pine64 PinePhone Braveheart (1.1), BIOS 2024.01 01/01/2024

pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : ieee80211_free_ack_frame+0x5c/0x90 [mac80211]

lr : ieee80211_free_ack_frame+0x5c/0x90 [mac80211]

sp : ffff80008c1b37b0

x29: ffff80008c1b37b0 x28: ffff000003be8000 x27: 0000000000000000

x26: 0000000000000000 x25: ffff000003dc14b8 x24: ffff80008c1b37d0

x23: ffff000000ff9f80 x22: 0000000000000000 x21: 000000007fffffff

x20: ffff80007c7e93d8 x19: ffff00006e66f400 x18: 0000000000000000

x17: ffff7ffffd2b3000 x16: ffff800083fc0000 x15: 0000000000000000

x14: 0000000000000000 x13: 2173656d61726620 x12: 6b636120676e6964

x11: 0000000000000000 x10: 000000000000005d x9 : ffff8000802af2b0

x8 : ffff80008c1b3430 x7 : 0000000000000001 x6 : 0000000000000001

x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000

x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000003be8000

Call trace:

ieee80211_free_ack_frame+0x5c/0x90 [mac80211]

idr_for_each+0x74/0x110

ieee80211_free_hw+0x44/0xe8 [mac80211]

rtw_sdio_remove+0x9c/0xc0 [rtw88_sdio]

sdio_bus_remove+0x44/0x180

device_remove+0x54/0x90

device_release_driver_internal+0x1d4/0x238

driver_detach+0x54/0xc0

bus_remove_driver+0x78/0x108

driver_unregister+0x38/0x78

sdio_unregister_driver+0x2c/0x40

rtw_8723cs_driver_exit+0x18/0x1000 [rtw88_8723cs]

__do_sys_delete_module.isra.0+0x190/0x338

__arm64_sys_delete_module+0x1c/0x30

invoke_syscall+0x74/0x100

el0_svc_common.constprop.0+0x48/0xf0

do_el0_svc+0x24/0x38

el0_svc+0x3c/0x158

el0t_64_sync_handler+0x120/0x138

el0t_64_sync+0x194/0x198

---[ end trace 0000000000000000 ]---