AuxXxilium/linux_dsm_epyc7002
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4e7a3fa539
linux_dsm_epyc7002/drivers/net/wireless
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Simon Wunderlich 4e7a3fa539 ath9k: FFT magnitude check: don't consider lower 3 data bits 
There were a lot of Magnitude Mismatch while getting FFT samples on my
hardware (Atheros AR9462. I've compared the reported magnitude with
the data in the FFT bin, and the FFT bin was less accurate:

[ 5395.193030] ath: phy0: FFT HT20 frame: max mag 0x89,max_mag_idx 28,
,magnitude 0x89 max_exp 0, data[28] = 0x88
[ 5395.194525] ath: phy0: FFT HT20 frame: max mag 0x89,max_mag_idx 28,
,magnitude 0x89 max_exp 0, data[28] = 0x88
[ 5395.196012] ath: phy0: FFT HT20 frame: max mag 0x88,max_mag_idx 28,
,magnitude 0x88 max_exp 0, data[28] = 0x88
[ 5395.197509] ath: phy0: FFT HT20 frame: max mag 0x6C,max_mag_idx 28,
,magnitude 0x6C max_exp 0, data[28] = 0x68
[ 5395.199015] ath: phy0: FFT HT20 frame: max mag 0x78,max_mag_idx 28,
,magnitude 0x78 max_exp 0, data[28] = 0x78
[ 5395.200497] ath: phy0: FFT HT20 frame: max mag 0xA1,max_mag_idx 28,
,magnitude 0xA1 max_exp 0, data[28] = 0xA0
[ 5395.202011] ath: phy0: FFT HT20 frame: max mag 0x91,max_mag_idx 28,
,magnitude 0x91 max_exp 0, data[28] = 0x90
[ 5395.203482] ath: phy0: FFT HT20 frame: max mag 0x89,max_mag_idx 28,
,magnitude 0x89 max_exp 0, data[28] = 0x88
[ 5395.204999] ath: phy0: FFT HT20 frame: max mag 0x27,max_mag_idx 4,
,magnitude 0x27 max_exp 0, data[4] = 0x20
[ 5395.206461] ath: phy0: FFT HT20 frame: max mag 0x41,max_mag_idx 28,
,magnitude 0x41 max_exp 0, data[28] = 0x40
[ 5395.207977] ath: phy0: FFT HT20 frame: max mag 0x51,max_mag_idx 28,
,magnitude 0x51 max_exp 0, data[28] = 0x50
[ 5395.209454] ath: phy0: FFT HT20 frame: max mag 0x53,max_mag_idx 28,
,magnitude 0x53 max_exp 0, data[28] = 0x50
[ 5395.210940] ath: phy0: FFT HT20 frame: max mag 0x40,max_mag_idx 28,
,magnitude 0x40 max_exp 0, data[28] = 0x40
[ 5395.212441] ath: phy0: FFT HT20 frame: max mag 0x59,max_mag_idx 28,
,magnitude 0x59 max_exp 0, data[28] = 0x58
[ 5395.213932] ath: phy0: FFT HT20 frame: max mag 0x53,max_mag_idx 28,
,magnitude 0x53 max_exp 0, data[28] = 0x50
[ 5395.215428] ath: phy0: FFT HT20 frame: max mag 0x7D,max_mag_idx 28,
,magnitude 0x7D max_exp 0, data[28] = 0x78
[ 5395.216910] ath: phy0: FFT HT20 frame: max mag 0x8C,max_mag_idx 28,
,magnitude 0x8C max_exp 0, data[28] = 0x88
[ 5395.218413] ath: phy0: FFT HT20 frame: max mag 0x7B,max_mag_idx 28,
,magnitude 0x7B max_exp 0, data[28] = 0x78
[ 5395.219900] ath: phy0: FFT HT20 frame: max mag 0x43,max_mag_idx 28,
,magnitude 0x43 max_exp 0, data[28] = 0x40

It seems like the lower 3 bits on my hardware are always zeroed, but the
magnitude matches otherwise. Therefore, let's not make the magnitude
check so strict so we can get those samples released to userspace.

Cc: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-10-02 07:44:07 +03:00
..
admtek net/wireless: fix spaces and grammar copy/paste in vendor Kconfig help text 2018-03-13 18:52:25 +02:00
ath ath9k: FFT magnitude check: don't consider lower 3 data bits 2018-10-02 07:44:07 +03:00
atmel atmel: Replace mdelay() with msleep() in probe_atmel_card() 2018-07-31 10:25:33 +03:00
broadcom b43legacy/leds: Ensure NUL-termination of LED name string 2018-08-09 18:44:54 +03:00
cisco airo: remove unused variables len and dev and clean up formatting 2018-07-31 10:17:19 +03:00
intel pci-v4.19-changes 2018-08-16 09:21:54 -07:00
intersil hostap: hide unused procfs helpers 2018-07-31 10:21:33 +03:00
marvell mwifiex: Fix skipped vendor specific IEs 2018-07-31 10:13:39 +03:00
mediatek mt76: fix build for MediaTek MT7610U USB wireless dongle 2018-08-09 18:12:28 +03:00
quantenna qtnfmac: implement basic WoWLAN support 2018-08-02 21:55:49 +03:00
ralink pci-v4.19-changes 2018-08-16 09:21:54 -07:00
realtek rtlwifi: btcoex: Fix if == else warnings in halbtc8723b2ant.c 2018-08-09 18:15:01 +03:00
rsi rsi: remove redundant variables bss, wh and temp_flash_content 2018-08-09 18:13:46 +03:00
st treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
ti Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00
zydas zd1211rw: use irqsave() in USB's complete callback 2018-06-27 19:12:43 +03:00
Kconfig
mac80211_hwsim.c mac80211_hwsim: Add support for HE 2018-07-09 10:21:28 +02:00
mac80211_hwsim.h mac80211_hwsim: add permanent mac address option for new radios 2018-01-31 12:45:35 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ray_cs.c ray_cs: remove redundant pointer 'p' 2018-07-31 10:19:50 +03:00
ray_cs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rayctl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rndis_wlan.c wireless-drivers: use BIT_ULL for NL80211_STA_INFO_ attribute types 2018-06-27 19:07:39 +03:00
wl3501_cs.c
wl3501.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00