mlxbf_gige: remove driver-managed interrupt counts

[David Thompson]

SRU Justification:

[Impact]

The mlxbf_gige driver currently has three driver-managed
interrupt counts that increment each time every interrupt
handler executes. This has been reviewed and found to be
unnecessary given core logic in Linux kernel manages the
same information.

[Fix]

The fix is to remove the driver-managed interrupt counts
from the driver itself, and let the core handle it.
There is an upstream commit already that makes this change.

[Test Case]

The driver should function as before, specifically:
* driver probes successfully
* oob_net0 link comes up, as seen with "ifconfig -a"

[Regression Potential]

This change only affects counters that are visible inside
driver, so thus should not introduce any regression.

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

This bug is awaiting verification that the linux-bluefield/5.4.0-1042.47 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!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-bluefield - 5.4.0-1042.47

---------------
linux-bluefield (5.4.0-1042.47) focal; urgency=medium

  * focal/linux-bluefield: 5.4.0-1042.47 -proposed tracker (LP: #1979463)

  * Focal update: upstream stable patchset v5.4.192 (LP: #1979014)
    - [Config] bluefield: update configs for NVM

  * flowtable: fix TCP flow teardown (LP: #1975649)
    - netfilter: flowtable: fix TCP flow teardown

  * remove offload_pickup sysctl again (LP: #1975820)
    - netfilter: conntrack: remove offload_pickup sysctl again

  * mlxbf_gige: remove driver-managed interrupt counts (LP: #1975749)
    - mlxbf_gige: remove driver-managed interrupt counts

  [ Ubuntu: 5.4.0-122.138 ]

  * focal/linux: 5.4.0-122.138 -proposed tracker (LP: #1979489)
  * Remove SAUCE patches from test_vxlan_under_vrf.sh in net of
    ubuntu_kernel_selftests (LP: #1975691)
    - Revert "UBUNTU: SAUCE: selftests: net: Don't fail test_vxlan_under_vrf on
      xfail"
    - Revert "UBUNTU: SAUCE: selftests: net: Make test for VXLAN underlay in non-
      default VRF an expected failure"
  * Enable Asus USB-BT500 Bluetooth dongle(0b05:190e) (LP: #1976613)
    - Bluetooth: btusb: Add flag to define wideband speech capability
    - Bluetooth: btrtl: Add support for RTL8761B
    - Bluetooth: btusb: Add 0x0b05:0x190e Realtek 8761BU (ASUS BT500) device.
  * [UBUNTU 20.04] rcu stalls with many storage key guests (LP: #1975582)
    - s390/gmap: voluntarily schedule during key setting
    - s390/mm: use non-quiescing sske for KVM switch to keyed guest
  * Ubuntu 5.4.0-117.132-generic 5.4.189 has BUG: kernel NULL pointer
    dereference, address: 0000000000000034 (LP: #1978719)
    - mm: rmap: explicitly reset vma->anon_vma in unlink_anon_vmas()
  * Focal update: upstream stable patchset v5.4.192 (LP: #1979014)
    - floppy: disable FDRAWCMD by default
    - [Config] updateconfigs for BLK_DEV_FD_RAWCMD
    - hamradio: defer 6pack kfree after unregister_netdev
    - hamradio: remove needs_free_netdev to avoid UAF
    - lightnvm: disable the subsystem
    - [Config] updateconfigs for NVM, NVM_PBLK
    - usb: mtu3: fix USB 3.0 dual-role-switch from device to host
    - USB: quirks: add a Realtek card reader
    - USB: quirks: add STRING quirk for VCOM device
    - USB: serial: whiteheat: fix heap overflow in WHITEHEAT_GET_DTR_RTS
    - USB: serial: cp210x: add PIDs for Kamstrup USB Meter Reader
    - USB: serial: option: add support for Cinterion MV32-WA/MV32-WB
    - USB: serial: option: add Telit 0x1057, 0x1058, 0x1075 compositions
    - xhci: stop polling roothubs after shutdown
    - xhci: increase usb U3 -> U0 link resume timeout from 100ms to 500ms
    - iio: dac: ad5592r: Fix the missing return value.
    - iio: dac: ad5446: Fix read_raw not returning set value
    - iio: magnetometer: ak8975: Fix the error handling in ak8975_power_on()
    - usb: misc: fix improper handling of refcount in uss720_probe()
    - usb: typec: ucsi: Fix role swapping
    - usb: gadget: uvc: Fix crash when encoding data for usb request
    - usb: gadget: configfs: clear deactivation flag in
      configfs_composite_unbind()
    - usb: dwc3: core: Fix tx/rx threshold settings
    - ...