Target debugfs entry is removed via async_schedule() which isn't drained
when adding same name target, so failure of "Directory 'target11:0:0' with
parent 'scsi_debug' already present!" can be triggered easily.
Fix it by switching to domain async schedule, and draining it before
adding new target debugfs entry.
Cc: Wenchao Hao <haowenchao2@xxxxxxxxxx>
Fixes: f084fe52c640 ("scsi: scsi_debug: Add debugfs interface to fail target reset")
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
drivers/scsi/scsi_debug.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index acf0592d63da..91f022fb8d0c 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -926,6 +926,7 @@ static const int device_qfull_result =
static const int condition_met_result = SAM_STAT_CONDITION_MET;
static struct dentry *sdebug_debugfs_root;
+static ASYNC_DOMAIN_EXCLUSIVE(sdebug_async_domain);
static void sdebug_err_free(struct rcu_head *head)
{
@@ -1148,6 +1149,8 @@ static int sdebug_target_alloc(struct scsi_target *starget)
if (!targetip)
return -ENOMEM;
+ async_synchronize_full_domain(&sdebug_async_domain);
+
targetip->debugfs_entry = debugfs_create_dir(dev_name(&starget->dev),
sdebug_debugfs_root);
@@ -1174,7 +1177,8 @@ static void sdebug_target_destroy(struct scsi_target *starget)
targetip = (struct sdebug_target_info *)starget->hostdata;
if (targetip) {
starget->hostdata = NULL;
- async_schedule(sdebug_tartget_cleanup_async, targetip);
+ async_schedule_domain(sdebug_tartget_cleanup_async, targetip,
+ &sdebug_async_domain);
}
}
--
2.44.0
