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Ping-Ke Shih 683a4647a7 wifi: rtw89: 8852a: rfk: fix div 0 exception 
The DPK is a kind of RF calibration whose algorithm is to fine tune
parameters and calibrate, and check the result. If the result isn't good
enough, it could adjust parameters and try again.

This issue is to read and show the result, but it could be a negative
calibration result that causes divisor 0 and core dump. So, fix it by
phy_div() that does division only if divisor isn't zero; otherwise,
zero is adopted.

  divide error: 0000 [#1] PREEMPT SMP NOPTI
  CPU: 1 PID: 728 Comm: wpa_supplicant Not tainted 5.10.114-16019-g462a1661811a #1 <HASH:d024 28>
  RIP: 0010:rtw8852a_dpk+0x14ae/0x288f [rtw89_core]
  RSP: 0018:ffffa9bb412a7520 EFLAGS: 00010246
  RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
  RDX: 0000000000000000 RSI: 00000000000180fc RDI: ffffa141d01023c0
  RBP: ffffa9bb412a76a0 R08: 0000000000001319 R09: 00000000ffffff92
  R10: ffffffffc0292de3 R11: ffffffffc00d2f51 R12: 0000000000000000
  R13: ffffa141d01023c0 R14: ffffffffc0290250 R15: ffffa141d0102638
  FS:  00007fa99f5c2740(0000) GS:ffffa142e5e80000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000000013e8e010 CR3: 0000000110d2c000 CR4: 0000000000750ee0
  PKRU: 55555554
  Call Trace:
   rtw89_core_sta_add+0x95/0x9c [rtw89_core <HASH:d239 29>]
   rtw89_ops_sta_state+0x5d/0x108 [rtw89_core <HASH:d239 29>]
   drv_sta_state+0x115/0x66f [mac80211 <HASH:81fe 30>]
   sta_info_insert_rcu+0x45c/0x713 [mac80211 <HASH:81fe 30>]
   sta_info_insert+0xf/0x1b [mac80211 <HASH:81fe 30>]
   ieee80211_prep_connection+0x9d6/0xb0c [mac80211 <HASH:81fe 30>]
   ieee80211_mgd_auth+0x2aa/0x352 [mac80211 <HASH:81fe 30>]
   cfg80211_mlme_auth+0x160/0x1f6 [cfg80211 <HASH:00cd 31>]
   nl80211_authenticate+0x2e5/0x306 [cfg80211 <HASH:00cd 31>]
   genl_rcv_msg+0x371/0x3a1
   ? nl80211_stop_sched_scan+0xe5/0xe5 [cfg80211 <HASH:00cd 31>]
   ? genl_rcv+0x36/0x36
   netlink_rcv_skb+0x8a/0xf9
   genl_rcv+0x28/0x36
   netlink_unicast+0x27b/0x3a0
   netlink_sendmsg+0x2aa/0x469
   sock_sendmsg_nosec+0x49/0x4d
   ____sys_sendmsg+0xe5/0x213
   __sys_sendmsg+0xec/0x157
   ? syscall_enter_from_user_mode+0xd7/0x116
   do_syscall_64+0x43/0x55
   entry_SYSCALL_64_after_hwframe+0x44/0xa9
  RIP: 0033:0x7fa99f6e689b

Fixes: e3ec7017f6 ("rtw89: add Realtek 802.11ax driver")
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220613065144.15647-1-pkshih@realtek.com
2022-06-21 09:16:39 +03:00
..
accessibility Revert "speakup: Generate speakupmap.h automatically" 2022-05-20 21:07:05 +02:00
acpi More power management updates for 5.19-rc1 2022-05-30 11:37:26 -07:00
amba Driver core changes for 5.19-rc1 2022-06-03 11:48:47 -07:00
android fix for breakage in #work.fd this window 2022-06-05 17:14:03 -07:00
ata ata: libata-transport: fix {dma|pio|xfer}_mode sysfs files 2022-06-09 09:25:25 +09:00
atm
auxdisplay
base firmware_loader: enable XZ by default if compressed support is enabled 2022-06-03 15:46:03 -07:00
bcma
block xen: branch for v5.19-rc1b 2022-06-04 13:42:53 -07:00
bluetooth Bluetooth: btmtksdio: fix the reset takes too long 2022-05-13 13:19:01 +02:00
bus Driver core changes for 5.19-rc1 2022-06-03 11:48:47 -07:00
cdrom cdrom: remove obsolete TODO list 2022-05-15 18:31:28 -06:00
char Char / Misc / Other smaller driver subsystem updates for 5.19-rc1 2022-06-03 11:36:34 -07:00
clk Driver core changes for 5.19-rc1 2022-06-03 11:48:47 -07:00
clocksource Clockevent/clocksource updates: 2022-06-05 10:47:06 -07:00
comedi drivers: comedi: replace ternary operator with min() 2022-05-19 18:54:45 +02:00
connector
counter
cpufreq ARM: multiplatform changes, part 2 2022-06-02 15:23:54 -07:00
cpuidle Merge branches 'pm-em' and 'pm-cpuidle' 2022-05-23 19:18:51 +02:00
crypto virtio-crypto: enable retry for virtio-crypto-dev 2022-05-31 12:45:09 -04:00
cxl cxl/port: Enable HDM Capability after validating DVSEC Ranges 2022-05-20 12:30:53 -07:00
dax dax: add .recovery_write dax_operation 2022-05-16 13:37:59 -07:00
dca
devfreq PM / devfreq: passive: Return non-error when not-supported event is required 2022-05-19 19:32:19 +02:00
dio drivers: dio: add missing iounmap() in dio_init() 2022-05-19 18:56:51 +02:00
dma dmaengine updates for v5.19-rc1 2022-05-29 11:38:27 -07:00
dma-buf drm for 5.19-rc1 2022-05-25 16:18:27 -07:00
edac - A gargen variety of fixes which don't fit any other tip bucket: 2022-05-23 19:32:59 -07:00
eisa
extcon extcon: Modify extcon device to be created after driver data is set 2022-05-13 17:03:41 +09:00
firewire Merge branch 'for-linus' into for-next 2022-05-23 07:48:27 +02:00
firmware Follow-up tweaks for the EFI changes in v5.19 2022-06-03 13:39:30 -07:00
fpga
fsi
gnss
gpio hte: New subsystem for v5.19-rc1 2022-06-05 09:12:28 -07:00
gpu drm fixes for 5.19-rc2 2022-06-10 10:13:24 -07:00
greybus
hid USB / Thunderbolt changes for 5.19-rc1 2022-06-03 11:17:49 -07:00
hsi
hte hte: Uninitialized variable in hte_ts_get() 2022-05-20 15:54:41 +02:00
hv Driver core changes for 5.19-rc1 2022-06-03 11:48:47 -07:00
hwmon hwmon: (aquacomputer_d5next) Fix an error handling path in aqc_probe() 2022-05-22 12:25:55 -07:00
hwspinlock
hwtracing
i2c i2c: ismt: prevent memory corruption in ismt_access() 2022-06-02 08:40:56 -07:00
i3c i3c: master: svc: fix returnvar.cocci warning 2022-05-17 22:34:42 +02:00
idle cpuidle,intel_idle: Fix CPUIDLE_FLAG_IRQ_ENABLE 2022-06-08 18:05:45 +02:00
iio Bitmap patches for 5.19-rc1 2022-06-04 14:04:27 -07:00
infiniband RDMA/mlx5: Support handling of modify-header pattern ICM area 2022-06-13 14:58:01 -07:00
input Input updates for v5.19-rc1 2022-06-07 15:00:29 -07:00
interconnect Char / Misc / Other smaller driver subsystem updates for 5.19-rc1 2022-06-03 11:36:34 -07:00
iommu IOMMU Updates for Linux v5.19 2022-05-31 09:56:54 -07:00
ipack
irqchip irq: mips: replace cpumask_weight with cpumask_empty where appropriate 2022-06-03 06:52:57 -07:00
isdn
leds ARM: multiplatform changes, part 2 2022-06-02 15:23:54 -07:00
macintosh macintosh: via-pmu and via-cuda need RTC_LIB 2022-05-22 15:58:30 +10:00
mailbox mailbox: qcom-ipcc: Fix -Wunused-function with CONFIG_PM_SLEEP=n 2022-05-24 08:08:24 -05:00
mcb
md for-5.19/drivers-2022-06-02 2022-06-03 10:25:56 -07:00
media USB / Thunderbolt changes for 5.19-rc1 2022-06-03 11:17:49 -07:00
memory More power management updates for 5.19-rc1 2022-05-30 11:37:26 -07:00
memstick
message
mfd ARM: multiplatform changes, part 2 2022-06-02 15:23:54 -07:00
misc Char / Misc / Other smaller driver subsystem updates for 5.19-rc1 2022-06-03 11:36:34 -07:00
mmc MMC core: 2022-06-07 14:24:30 -07:00
most
mtd This pull request contains fixes for JFFS2, UBI and UBIFS 2022-06-03 14:42:24 -07:00
mux
net wifi: rtw89: 8852a: rfk: fix div 0 exception 2022-06-21 09:16:39 +03:00
nfc nfc: nfcmrvl: Fix memory leak in nfcmrvl_play_deferred 2022-06-08 10:18:10 -07:00
ntb
nubus
nvdimm cxl for 5.19 2022-05-27 21:24:19 -07:00
nvme SCSI misc on 20220604 2022-06-05 09:25:12 -07:00
nvmem
of drm for 5.19-rc1 2022-05-25 16:18:27 -07:00
opp OPP updates for 5.19-rc1 2022-05-25 15:02:26 +02:00
parisc
parport
pci Driver core changes for 5.19-rc1 2022-06-03 11:48:47 -07:00
pcmcia ARM: multiplatform changes, part 2 2022-06-02 15:23:54 -07:00
peci
perf arm64 updates for 5.19: 2022-05-23 21:06:11 -07:00
phy phy-for-5.19 2022-05-19 16:56:17 +02:00
pinctrl Pin control bulk changes for the v5.19 series: 2022-05-28 11:15:54 -07:00
platform MIPS: Loongson-3: fix compile mips cpu_hwmon as module build error. 2022-06-09 22:24:19 +02:00
pnp
power Char / Misc / Other smaller driver subsystem updates for 5.19-rc1 2022-06-03 11:36:34 -07:00
powercap Merge branches 'pm-em' and 'pm-cpuidle' 2022-05-23 19:18:51 +02:00
pps
ps3
ptp ptp_ocp: replace kzalloc(x*y) by kcalloc(y, x) 2022-06-10 08:36:08 -07:00
pwm pwm: pwm-cros-ec: Add channel type support 2022-05-20 16:40:01 +02:00
rapidio
ras
regulator Merge back reboot/poweroff notifiers rework for 5.19-rc1. 2022-05-25 14:38:29 +02:00
remoteproc
reset
rpmsg Driver core changes for 5.19-rc1 2022-06-03 11:48:47 -07:00
rtc ARM: multiplatform changes, part 2 2022-06-02 15:23:54 -07:00
s390 Driver core changes for 5.19-rc1 2022-06-03 11:48:47 -07:00
sbus
scsi SCSI misc on 20220604 2022-06-05 09:25:12 -07:00
sh
siox
slimbus Driver core changes for 5.19-rc1 2022-06-03 11:48:47 -07:00
soc Char / Misc / Other smaller driver subsystem updates for 5.19-rc1 2022-06-03 11:36:34 -07:00
soundwire
spi Driver core changes for 5.19-rc1 2022-06-03 11:48:47 -07:00
spmi
ssb
staging cfg80211: Indicate MLO connection info in connect and roam callbacks 2022-06-20 12:57:09 +02:00
target blk-mq: remove the done argument to blk_execute_rq_nowait 2022-05-28 06:15:27 -06:00
tc
tee Fix a compiler warning in OP-TEE driver 2022-05-30 14:44:27 +02:00
thermal Additional thermal control update for 5.19-rc1 2022-05-30 11:34:13 -07:00
thunderbolt USB / Thunderbolt changes for 5.19-rc1 2022-06-03 11:17:49 -07:00
tty xen: branch for v5.19-rc1b 2022-06-04 13:42:53 -07:00
ufs SCSI misc on 20220604 2022-06-05 09:25:12 -07:00
uio
usb Char / Misc / Other smaller driver subsystem updates for 5.19-rc1 2022-06-03 11:36:34 -07:00
vdpa Driver core changes for 5.19-rc1 2022-06-03 11:48:47 -07:00
vfio VFIO updates for v5.19-rc1 2022-06-01 13:49:15 -07:00
vhost vhost: rename vhost_work_dev_flush 2022-05-31 12:45:10 -04:00
video parisc architecture fixes & updates for kernel v5.19-rc1 2022-06-04 13:50:23 -07:00
virt Char / Misc / Other smaller driver subsystem updates for 5.19-rc1 2022-06-03 11:36:34 -07:00
virtio virtio: replace arch_has_restricted_virtio_memory_access() 2022-06-06 08:22:01 +02:00
vlynq
vme
w1
watchdog ARM: SoC changes, part 2 2022-06-02 15:27:44 -07:00
xen xen: unexport __init-annotated xen_xlate_map_ballooned_pages() 2022-06-07 08:11:35 +02:00
zorro
Kconfig SCSI misc on 20220604 2022-06-05 09:25:12 -07:00
Makefile SCSI misc on 20220604 2022-06-05 09:25:12 -07:00