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kunit: bail out early in __kunit_test_suites_init() if there are no suites to test

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[ Upstream commit 5496b9b77d ]

Commit c72a870926 added a mutex to prevent kunit tests from running
concurrently.  Unfortunately that mutex gets locked during module load
regardless of whether the module actually has any kunit tests.  This
causes a problem for kunit tests that might need to load other kernel
modules (e.g. gss_krb5_test loading the camellia module).

So check to see if there are actually any tests to run before locking
the kunit_run_lock mutex.

Fixes: c72a870926 ("kunit: add ability to run tests after boot using debugfs")
Reported-by: Nico Pache <npache@redhat.com>
Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Scott Mayhew 2024-03-21 10:32:00 -04:00 committed by Greg Kroah-Hartman
parent 67364ec521
commit a5ac124bdd
1 changed files with 3 additions and 0 deletions
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3
lib/kunit/test.c
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@ -712,6 +712,9 @@ int __kunit_test_suites_init(struct kunit_suite * const * const suites, int num_
{
unsigned int i;
if (num_suites == 0)
return 0;
if (!kunit_enabled() && num_suites > 0) {
pr_info("kunit: disabled\n");
return 0;