Skip rtcpie test in kselftests/timers if the default RTC device does not exist

[Po-Hsu Lin]

[Impact]
This test will require /dev/rtc0, the default RTC device, or one
specified by user to run. Since this default RTC is not guaranteed to
exist on all of the devices, so check its existence first, otherwise
skip this test with the kselftest skip code 4.

Without this patch this test will fail like this on a s390x zVM:
$ selftests: timers: rtcpie
$ /dev/rtc0: No such file or directory
not ok 1 selftests: timers: rtcpie # exit=22

We have this test disabled in our test suite with an if check [1],
thus we're not seeing this failure recently. With this patch
applied we can remove that code block later.

[1] https://kernel.ubuntu.com/git/ubuntu/autotest-client-tests.git/tree/ubuntu_kernel_selftests/ubuntu_kernel_selftests.py#n133

[Fix]
* 0d3e5a057992bd selftests: timers: rtcpie: skip test if default RTC device does not exist

[Test]
Run this test with patched source tree on a s390x zVM and it will be
skipped correctly:
$ selftests: timers: rtcpie
$ Default RTC /dev/rtc0 does not exist. Test Skipped!
not ok 9 selftests: timers: rtcpie # SKIP

[Where problems could occur]
If this fix is incorrect we might see it failing again on systems that without /dev/rtc0 (after removing our local hacks in autotest-client-tests)

[Po-Hsu Lin (cypressyew)]

https://lists.ubuntu.com/archives/kernel-team/2021-July/122691.html

[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!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-oem-5.10 - 5.10.0-1044.46

---------------
linux-oem-5.10 (5.10.0-1044.46) focal; urgency=medium

  * focal/linux-oem-5.10: 5.10.0-1044.46 -proposed tracker (LP: #1939533)

  * mute/micmute LEDs no function on HP ProBook 650 G8 (LP: #1939473)
    - SAUCE: ALSA: hda/realtek: fix mute/micmute LEDs for HP ProBook 650 G8
      Notebook PC

 -- Chia-Lin Kao (AceLan) <email address hidden> Wed, 11 Aug 2021 17:35:07 +0800

[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-hirsute' to 'verification-done-hirsute'. If the problem still exists, change the tag 'verification-needed-hirsute' to 'verification-failed-hirsute'.

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 - 5.4.0-84.94

---------------
linux (5.4.0-84.94) focal; urgency=medium

  * focal/linux: 5.4.0-84.94 -proposed tracker (LP: #1941767)

  * Server boot failure after adding checks for ACPI IRQ override (LP: #1941657)
    - Revert "ACPI: resources: Add checks for ACPI IRQ override"

linux (5.4.0-83.93) focal; urgency=medium

  * focal/linux: 5.4.0-83.93 -proposed tracker (LP: #1940159)

  * fails to launch linux L2 guests on AMD (LP: #1940134) // CVE-2021-3653
    - KVM: nSVM: avoid picking up unsupported bits from L2 in int_ctl
      (CVE-2021-3653)

  * fails to launch linux L2 guests on AMD (LP: #1940134)
    - SAUCE: Revert "UBUNTU: SAUCE: KVM: nSVM: avoid picking up unsupported bits
      from L2 in int_ctl"

linux (5.4.0-82.92) focal; urgency=medium

  * focal/linux: 5.4.0-82.92 -proposed tracker (LP: #1939799)

  * Packaging resync (LP: #1786013)
    - debian/dkms-versions -- update from kernel-versions (main/2021.08.16)

  * CVE-2021-3656
    - SAUCE: KVM: nSVM: always intercept VMLOAD/VMSAVE when nested

  * CVE-2021-3653
    - SAUCE: KVM: nSVM: avoid picking up unsupported bits from L2 in int_ctl

  * [regression] USB device is not detected during boot (LP: #1939638)
    - SAUCE: Revert "usb: core: reduce power-on-good delay time of root hub"

  * dev_forward_skb: do not scrub skb mark within the same name space
    (LP: #1935040)
    - dev_forward_skb: do not scrub skb mark within the same name space

  * XPS 9510 (TGL) Screen Brightness could not be changed (LP: #1933566)
    - SAUCE: drm/i915: Force DPCD backlight mode for Dell XPS 9510(TGL)

  * Acer Aspire 5 sound driver issues (LP: #1930188)
    - ALSA: hda/realtek: headphone and mic don't work on an Acer laptop

  * Sony Dualshock 4 usb dongle crashes the whole system (LP: #1935846)
    - HID: sony: Workaround for DS4 dongle hotplug kernel crash.

  * [21.10 FEAT] KVM: Provide a secure guest indication (LP: #1933173)
    - s390/uv: add prot virt guest/host indication files
    - s390/uv: fix prot virt host indication compilation

  * Skip rtcpie test in kselftests/timers if the default RTC device does not
    exist (LP: #1937991)
    - selftests: timers: rtcpie: skip test if default RTC device does not exist

  * Focal update: v5.4.133 upstream stable release (LP: #1938713)
    - drm/mxsfb: Don't select DRM_KMS_FB_HELPER
    - drm/zte: Don't select DRM_KMS_FB_HELPER
    - drm/amd/amdgpu/sriov disable all ip hw status by default
    - drm/vc4: fix argument ordering in vc4_crtc_get_margins()
    - net: pch_gbe: Use proper accessors to BE data in pch_ptp_match()
    - drm/amd/display: fix use_max_lb flag for 420 pixel formats
    - hugetlb: clear huge pte during flush function on mips platform
    - atm: iphase: fix possible use-after-free in ia_module_exit()
    - mISDN: fix possible use-after-free in HFC_cleanup()
    - atm: nicstar: Fix possible use-after-free in nicstar_cleanup()
    - net: Treat __napi_schedule_irqoff() as __napi_schedule() on PREEMPT_RT
    - drm/mediatek: Fix PM reference leak in mtk_crtc_ddp_hw_init()
    - reiserfs: add check for invalid 1st journal block
    - drm/virtio: Fix double free on probe failure
    - dr...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 5.11.0-34.36

---------------
linux (5.11.0-34.36) hirsute; urgency=medium

  * hirsute/linux: 5.11.0-34.36 -proposed tracker (LP: #1941766)

  * Server boot failure after adding checks for ACPI IRQ override (LP: #1941657)
    - Revert "ACPI: resources: Add checks for ACPI IRQ override"

linux (5.11.0-33.35) hirsute; urgency=medium

  * hirsute/linux: 5.11.0-33.35 -proposed tracker (LP: #1940101)

  * libvirtd fails to create VM (LP: #1940107)
    - sched: Stop PF_NO_SETAFFINITY from being inherited by various init system
      threads

linux (5.11.0-32.34) hirsute; urgency=medium

  * hirsute/linux: 5.11.0-32.34 -proposed tracker (LP: #1939769)

  * Packaging resync (LP: #1786013)
    - debian/dkms-versions -- update from kernel-versions (main/2021.08.16)

  * CVE-2021-3656
    - SAUCE: KVM: nSVM: always intercept VMLOAD/VMSAVE when nested

  * CVE-2021-3653
    - SAUCE: KVM: nSVM: avoid picking up unsupported bits from L2 in int_ctl

  * [regression] USB device is not detected during boot (LP: #1939638)
    - SAUCE: Revert "usb: core: reduce power-on-good delay time of root hub"

  * Support builtin revoked certificates (LP: #1932029)
    - [Packaging] build canonical-revoked-certs.pem from branch/arch certs
    - [Packaging] Revoke 2012 UEFI signing certificate as built-in
    - [Config] Configure CONFIG_SYSTEM_REVOCATION_KEYS with revoked keys

  * Support importing mokx keys into revocation list from the mok table
    (LP: #1928679)
    - SAUCE: integrity: add informational messages when revoking certs

  * Support importing mokx keys into revocation list from the mok table
    (LP: #1928679) // CVE-2020-26541 when certificates are revoked via
    MokListXRT.
    - SAUCE: integrity: Load mokx certs from the EFI MOK config table

  * Include product_sku info to modalias (LP: #1938143)
    - firmware/dmi: Include product_sku info to modalias

  * Fix Ethernet not working by hotplug - RTL8106E (LP: #1930645)
    - net: phy: rename PHY_IGNORE_INTERRUPT to PHY_MAC_INTERRUPT
    - SAUCE: r8169: Use PHY_POLL when RTL8106E enable ASPM

  * [SRU][H/OEM-5.10/OEM-5.13/U] Fix system hang after unplug tbt dock
    (LP: #1938689)
    - SAUCE: igc: fix page fault when thunderbolt is unplugged

  * [Regression] Audio card [8086:9d71] not detected after upgrade from linux
    5.4 to 5.8 (LP: #1915117)
    - [Config] set CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC to y

  * Backlight (screen brightness) on Lenovo P14s AMD Gen2 inop (LP: #1934557)
    - drm/amdgpu/display: only enable aux backlight control for OLED panels

  * Touchpad not working with ASUS TUF F15 (LP: #1937056)
    - pinctrl: tigerlake: Fix GPIO mapping for newer version of software

  * dev_forward_skb: do not scrub skb mark within the same name space
    (LP: #1935040)
    - dev_forward_skb: do not scrub skb mark within the same name space

  * Fix display output on HP hybrid GFX laptops (LP: #1936296)
    - drm/i915: Invoke another _DSM to enable MUX on HP Workstation laptops

  * [SRU][OEM-5.10/H] UBUNTU: SAUCE: Fix backlight control on Samsung 16727
    panel (LP: #1930527)
    - SAUCE: drm/i915: Force DPCD backlight mode for Samsung 16727 pa...

[Po-Hsu Lin (cypressyew)]

Applied on Impish via stable update https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1938047

[Po-Hsu Lin (cypressyew)]

https://kernel.ubuntu.com/git/ubuntu/autotest-client-tests.git/commit/?id=ad0347d5237adbc3632460e5050528ca25ebd4dd