Fix system reboot when disconnecting WiFi

[Kai-Heng Feng]

[Impact]
Hardware triggrs reboot when disconnecting WiFi connection.

[Fix]
There's a DMA bug in Intel WiFi 9000 needs to be limits to 6 RX queue
max.

[Test]
With the patch applied, a 1000 times of connect/disconnect loop doesn't
bring the system down.

[Regression Potential]
Not that I can think of. Hypothetically reducing RX queue rings will
reduce the RX speed, but the wireless transfter is a lot slower then DMA
operation, so we won't see any difference.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[jeremyszu (os369510)]

I'd verified this issue using -1032 kernel from -proposed on P620 with Intel 9260.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 5.8.0-25.26

---------------
linux (5.8.0-25.26) groovy; urgency=medium

  * groovy/linux: 5.8.0-25.26 -proposed tracker (LP: #1899940)

  * CVE-2020-12351
    - Bluetooth: L2CAP: Fix calling sk_filter on non-socket based channel

  * CVE-2020-12352
    - Bluetooth: A2MP: Fix not initializing all members

  * CVE-2020-12351 // CVE-2020-12352 // CVE-2020-24490
    - Bluetooth: Disable High Speed by default
    - Bluetooth: MGMT: Fix not checking if BT_HS is enabled
    - [Config] Disable BlueZ highspeed support

  * ec2-hibinit-agent needs to properly initialize swap file (LP: #1892728)
    - ext4: implement swap_activate aops using iomap

 -- Andrea Righi <email address hidden> Thu, 15 Oct 2020 12:09:24 +0200

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-oem-5.6 - 5.6.0-1032.33

---------------
linux-oem-5.6 (5.6.0-1032.33) focal; urgency=medium

  * focal/linux-oem-5.6: 5.6.0-1032.33 -proposed tracker (LP: #1899926)

  * CVE-2020-12351 // CVE-2020-12352 // CVE-2020-24490
    - Bluetooth: Disable High Speed by default
    - Bluetooth: MGMT: Fix not checking if BT_HS is enabled
    - [Config] Disable BlueZ highspeed support

  * CVE-2020-12351
    - Bluetooth: L2CAP: Fix calling sk_filter on non-socket based channel

  * CVE-2020-12352
    - Bluetooth: A2MP: Fix not initializing all members

  * Lenovo ThinkBook 14-IML Touchpad not showing up in /proc/bus/input/devices
    (LP: #1853277)
    - i2c: core: Call i2c_acpi_install_space_handler() before
      i2c_acpi_register_devices()

  * [SRU]alsa: add Dell tgl soundwire machines support (LP: #1900069)
    - ALSA: hda: add autodetection for SoundWire
    - ASoC: Intel: common: add match table for TGL MAX98373 + RT5682 SoundWire
      driver
    - ASoC: Intel: soc-acpi: mirror CML and TGL configurations
    - ASoC: SOF: topology: send ipc for all found DAIs in sof_set_dai_config
    - ASoC: topology: set component dai_index to ipc dai config dai_index
    - ASoC: Intel: add codec name prefix to ACPI machine description
    - ASoC: Intel: sof_sdw: remove hard-coded codec_conf table
    - ASoC: Intel: sof_sdw_rt700: add codec prefix
    - ASoC: Intel: add support for new SoundWire hardware layout on TGL
    - ASoC: Intel: sof_sdw_rt711: remove hard-coded codec name
    - ASoC/soundwire: bus: use property to set interrupt masks
    - soundwire: bus: filter-out unwanted interrupt reports
    - soundwire: slave: add first_interrupt_done status
    - soundwire: bus: use quirk to filter out invalid parity errors
    - ASoC: codecs: realtek-soundwire: ignore initial PARITY errors

  * Fix system reboot when disconnecting WiFi (LP: #1899726)
    - iwlwifi: msix: limit max RX queues for 9000 family

  * Improve descriptions for XFAIL cases in kselftests/net/psock_snd
    (LP: #1900088)
    - selftests/net: improve descriptions for XFAIL cases in psock_snd.sh

  * Fix broken MSI interrupt after HDA controller was suspended (LP: #1899586)
    - ALSA: hda: Skip controller resume if not needed
    - ALSA: hda: Always use jackpoll helper for jack update after resume
    - SAUCE: ALSA: hda: fix jack detection with Realtek codecs when in D3
    - ALSA: hda - let hs_mic be picked ahead of hp_mic

  * Enable brightness control on HP DreamColor panel (LP: #1898865)
    - drm/i915/dpcd_bl: Unbreak enable_dpcd_backlight modparam
    - SAUCE: drm/i915/dpcd_bl: Skip testing control capability with force DPCD
      quirk
    - SAUCE: drm/dp: HP DreamColor panel brigntness fix

  * alsa/hda/realtek - The front Mic on a HP machine doesn't work (LP: #1899508)
    - SAUCE: ALSA: hda/realtek - The front Mic on a HP machine doesn't work

 -- Timo Aaltonen <email address hidden> Fri, 16 Oct 2020 14:40:28 +0300

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 5.4.0-56.62

---------------
linux (5.4.0-56.62) focal; urgency=medium

  * focal/linux: 5.4.0-56.62 -proposed tracker (LP: #1905300)

  * CVE-2020-4788
    - selftests/powerpc: rfi_flush: disable entry flush if present
    - powerpc/64s: flush L1D on kernel entry
    - powerpc/64s: flush L1D after user accesses
    - selftests/powerpc: entry flush test

linux (5.4.0-55.61) focal; urgency=medium

  * focal/linux: 5.4.0-55.61 -proposed tracker (LP: #1903175)

  * Update kernel packaging to support forward porting kernels (LP: #1902957)
    - [Debian] Update for leader included in BACKPORT_SUFFIX

  * Avoid double newline when running insertchanges (LP: #1903293)
    - [Packaging] insertchanges: avoid double newline

  * EFI: Fails when BootCurrent entry does not exist (LP: #1899993)
    - efivarfs: Replace invalid slashes with exclamation marks in dentries.

  * CVE-2020-14351
    - perf/core: Fix race in the perf_mmap_close() function

  * raid10: Block discard is very slow, causing severe delays for mkfs and
    fstrim operations (LP: #1896578)
    - md: add md_submit_discard_bio() for submitting discard bio
    - md/raid10: extend r10bio devs to raid disks
    - md/raid10: pull codes that wait for blocked dev into one function
    - md/raid10: improve raid10 discard request
    - md/raid10: improve discard request for far layout
    - dm raid: fix discard limits for raid1 and raid10
    - dm raid: remove unnecessary discard limits for raid10

  * Bionic: btrfs: kernel BUG at /build/linux-
    eTBZpZ/linux-4.15.0/fs/btrfs/ctree.c:3233! (LP: #1902254)
    - btrfs: drop unnecessary offset_in_page in extent buffer helpers
    - btrfs: extent_io: do extra check for extent buffer read write functions
    - btrfs: extent-tree: kill BUG_ON() in __btrfs_free_extent()
    - btrfs: extent-tree: kill the BUG_ON() in insert_inline_extent_backref()
    - btrfs: ctree: check key order before merging tree blocks

  * Ethernet no link lights after reboot (Intel i225-v 2.5G) (LP: #1902578)
    - igc: Add PHY power management control

  * Undetected Data corruption in MPI workloads that use VSX for reductions on
    POWER9 DD2.1 systems (LP: #1902694)
    - powerpc: Fix undetected data corruption with P9N DD2.1 VSX CI load emulation
    - selftests/powerpc: Make alignment handler test P9N DD2.1 vector CI load
      workaround

  * [20.04 FEAT] Support/enhancement of NVMe IPL (LP: #1902179)
    - s390: nvme ipl
    - s390: nvme reipl
    - s390/ipl: support NVMe IPL kernel parameters

  * uvcvideo: add mapping for HEVC payloads (LP: #1895803)
    - media: uvcvideo: Add mapping for HEVC payloads

  * Focal update: v5.4.73 upstream stable release (LP: #1902115)
    - ibmveth: Switch order of ibmveth_helper calls.
    - ibmveth: Identify ingress large send packets.
    - ipv4: Restore flowi4_oif update before call to xfrm_lookup_route
    - mlx4: handle non-napi callers to napi_poll
    - net: fec: Fix phy_device lookup for phy_reset_after_clk_enable()
    - net: fec: Fix PHY init after phy_reset_after_clk_enable()
    - net: fix pos incrementment in ipv6_route_seq_next
    - net/smc: fix valid DMBE buffer sizes
    - net...