[PATCH V2] xfstests: clean up scsi_debug module handling

[Eric Sandeen]

2 little fixes to common scsi_debug handling.

* don't consider the scsi_debug module in use in
  _require, unless it can't be rmmod'd
* don't try to rmmod it in _put unless it is currently
  loaded

Signed-off-by: Eric Sandeen <sandeen at redhat.com>
---

Argh.

diff --git a/common.scsi_debug b/common.scsi_debug
index 9f9177c..a085a67 100644
--- a/common.scsi_debug
+++ b/common.scsi_debug
@@ -26,7 +26,7 @@ _require_scsi_debug()
 {
 	# make sure we have the module and it's not already used
 	modinfo scsi_debug 2>&1 > /dev/null || _notrun "scsi_debug module not found"
-	lsmod | grep -wq scsi_debug && _notrun "scsi_debug module in use"
+	lsmod | grep -wq scsi_debug && (rmmod scsi_debug || _notrun "scsi_debug module in use")
 	# make sure it has the features we need
 	# logical/physical sectors plus unmap support all went in together
 	modinfo scsi_debug | grep -wq sector_size || _notrun "scsi_debug too old"
@@ -58,5 +58,6 @@ _get_scsi_debug_dev()
 _put_scsi_debug_dev()
 {
 	sleep 1
+	lsmod | grep -wq scsi_debug || return
 	rmmod scsi_debug || _fail "Could not remove scsi_debug module"
 }