The test_blackhole_dev.sh kselftest relies on the test_blackhole_dev
kernel module to be present and loadable. If the module in not built
or not available on the system, modprobe fails and the test is
reported as a failure.

Add an explicit check for the availability of the test_blackhole_dev
module and skip the test when the module is missing.

https://virtuozzo.atlassian.net/browse/VSTOR-120995

Signed-off-by: Aleksei Oladko <[email protected]>
---
 tools/testing/selftests/net/test_blackhole_dev.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/testing/selftests/net/test_blackhole_dev.sh 
b/tools/testing/selftests/net/test_blackhole_dev.sh
index 3119b80e711f..8a5c3c0d4dc7 100755
--- a/tools/testing/selftests/net/test_blackhole_dev.sh
+++ b/tools/testing/selftests/net/test_blackhole_dev.sh
@@ -2,6 +2,9 @@
 # SPDX-License-Identifier: GPL-2.0
 # Runs blackhole-dev test using blackhole-dev kernel module
 
+ksft_skip=4
+modinfo test_blackhole_dev || exit $ksft_skip
+
 if /sbin/modprobe -q test_blackhole_dev ; then
        /sbin/modprobe -q -r test_blackhole_dev;
        echo "test_blackhole_dev: ok";
-- 
2.43.0

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