[PATCH blktests] nvme/058: detach loop device after test finish

[Nilay Shroff <nilay@linux.ibm.com>]

The nvme/058 creates three (temp file backed) namespaces and
attach each namespace to a loop device while starting the test.
However it never detach those namespaces from the loop device
once test finishes. Ideally, we should detach loop device from
namespace so that the associated loop device is later destroyed
and its resources are released. This patch helps detach each
namespace from its associated loop device after test finishes.

Signed-off-by: Nilay Shroff <nilay@linux.ibm.com>
---
 tests/nvme/058 | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tests/nvme/058 b/tests/nvme/058
index d230a21..99e7e81 100755
--- a/tests/nvme/058
+++ b/tests/nvme/058
@@ -99,6 +99,17 @@ test() {
 	done
 
 	_nvme_disconnect_subsys
+
+	for ((d = 1; d <= num_namespaces; d++)); do
+		local file_path
+		local blkdev
+
+		file_path="${TMPDIR}/img${d}"
+		blkdev="$(losetup -l | awk -v path="${file_path}" '$6 == path { print $1 }')"
+
+		losetup -d "${blkdev}"
+	done
+
 	_nvmet_target_cleanup
 
 	echo "Test complete"
-- 
2.47.1