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[F/H/I/Unstable,F-OEM-5.10/F-OEM-5.13,SRU,0/1] selftests: timers: rtcpie: skip test if default RTC device does not exist

Message ID 20210726075608.43981-1-po-hsu.lin@canonical.com
Headers show
Series selftests: timers: rtcpie: skip test if default RTC device does not exist | expand

Message

Po-Hsu Lin July 26, 2021, 7:56 a.m. UTC
[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 (1):
  selftests: timers: rtcpie: skip test if default RTC device does not
    exist

 tools/testing/selftests/timers/rtcpie.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

Comments

Tim Gardner July 26, 2021, 11:36 a.m. UTC | #1
Acked-by: Tim Gardner <tim.gardner@canonical.com>

On 7/26/21 1:56 AM, Po-Hsu Lin wrote:
> [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 (1):
>    selftests: timers: rtcpie: skip test if default RTC device does not
>      exist
> 
>   tools/testing/selftests/timers/rtcpie.c | 10 +++++++++-
>   1 file changed, 9 insertions(+), 1 deletion(-)
>
Andrea Righi July 26, 2021, 1:23 p.m. UTC | #2
On Mon, Jul 26, 2021 at 03:56:07PM +0800, Po-Hsu Lin wrote:
> [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 (1):
>   selftests: timers: rtcpie: skip test if default RTC device does not
>     exist

Applied to impish/5.13.

Thanks,
-Andrea
Timo Aaltonen July 28, 2021, 8:50 a.m. UTC | #3
On 26.7.2021 10.56, Po-Hsu Lin wrote:
> [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 (1):
>    selftests: timers: rtcpie: skip test if default RTC device does not
>      exist
> 
>   tools/testing/selftests/timers/rtcpie.c | 10 +++++++++-
>   1 file changed, 9 insertions(+), 1 deletion(-)
> 

applied to oem-5.13, thanks
AceLan Kao July 28, 2021, 10:12 a.m. UTC | #4
OEM-5.10 includes this fix from 5.10.52 stable update.
Kelsey Skunberg Aug. 6, 2021, 9:18 p.m. UTC | #5
Applied to Hirsute and Focal master-next. thank you! 

-Kelsey

On 2021-07-26 15:56:07 , Po-Hsu Lin wrote:
> [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 (1):
>   selftests: timers: rtcpie: skip test if default RTC device does not
>     exist
> 
>  tools/testing/selftests/timers/rtcpie.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> -- 
> 2.7.4
> 
> 
> -- 
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