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Venkateswara Naralasetty 41f77cc516 ath10k: provide survey info as accumulated data 
[ Upstream commit 720e5c03e5 ]

It is expected that the returned counters by .get_survey are monotonic
increasing. But the data from ath10k gets reset to zero regularly. Channel
active/busy time are then showing incorrect values (less than previous or
sometimes zero) for the currently active channel during successive survey
dump commands.

example:

  $ iw dev wlan0 survey dump
  Survey data from wlan0
  	frequency:                      5180 MHz [in use]
  	channel active time:            54995 ms
  	channel busy time:              432 ms
  	channel receive time:           0 ms
  	channel transmit time:          59 ms
  ...

  $ iw dev wlan0 survey dump
  Survey data from wlan0
  	frequency:                      5180 MHz [in use]
  	channel active time:            32592 ms
  	channel busy time:              254 ms
  	channel receive time:           0 ms
  	channel transmit time:          0 ms
  ...

The correct way to handle this is to use the non-clearing
WMI_BSS_SURVEY_REQ_TYPE_READ wmi_bss_survey_req_type. The firmware will
then accumulate the survey data and handle wrap arounds.

Tested-on: QCA9984 hw1.0 10.4-3.5.3-00057
Tested-on: QCA988X hw2.0 10.2.4-1.0-00047
Tested-on: QCA9888 hw2.0 10.4-3.9.0.2-00024
Tested-on: QCA4019 hw1.0 10.4-3.6-00140

Fixes: fa7937e3d5 ("ath10k: update bss channel survey information")
Signed-off-by: Venkateswara Naralasetty <vnaralas@codeaurora.org>
Tested-by: Markus Theil <markus.theil@tu-ilmenau.de>
Tested-by: John Deere <24601deerej@gmail.com>
[sven@narfation.org: adjust commit message]
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1592232686-28712-1-git-send-email-kvalo@codeaurora.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-29 09:55:05 +01:00
arch x86/events/amd/iommu: Fix sizeof mismatch 2020-10-29 09:55:00 +01:00
block block: ensure bdi->io_pages is always initialized 2020-09-12 13:40:22 +02:00
certs
crypto crypto: algif_skcipher - EBUSY on aio should be an error 2020-10-29 09:55:01 +01:00
Documentation x86/fpu: Allow multiple bits in clearcpuid= parameter 2020-10-29 09:55:00 +01:00
drivers ath10k: provide survey info as accumulated data 2020-10-29 09:55:05 +01:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:21:29 +01:00
fs cifs: Return the error from crypt_message when enc/dec key not found. 2020-10-29 09:54:59 +01:00
include net/ipv4: always honour route mtu during forwarding 2020-10-29 09:54:56 +01:00
init printk: queue wake_up_klogd irq_work only if per-CPU areas are ready 2020-07-22 09:32:13 +02:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2020-05-20 08:18:40 +02:00
kernel perf: Fix task_function_call() error handling 2020-10-14 10:31:26 +02:00
lib Fonts: Support FONT_EXTRA_WORDS macros for built-in fonts 2020-10-14 10:31:21 +02:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged 2020-10-14 10:31:26 +02:00
net icmp: randomize the global rate limiter 2020-10-29 09:54:58 +01:00
samples samples: bpf: Fix build error 2020-06-03 08:19:31 +02:00
scripts checkpatch: fix the usage of capture group ( ... ) 2020-09-09 19:04:32 +02:00
security ima: Don't ignore errors from crypto_shash_update() 2020-10-29 09:54:59 +01:00
sound ALSA: hda/realtek: Enable audio jacks of ASUS D700SA with ALC887 2020-10-29 09:54:58 +01:00
tools perf cs-etm: Move definition of 'traceid_list' global variable from header file 2020-10-17 10:12:56 +02:00
usr initramfs: restore default compression behavior 2020-04-13 10:44:59 +02:00
virt KVM: arm64: Assume write fault on S1PTW permission fault on instruction fetch 2020-10-01 13:14:54 +02:00
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.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
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MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2020-09-26 18:01:31 +02:00
Makefile Linux 4.19.152 2020-10-17 10:12:58 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.