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Diffstat (limited to 'kernel/trace/blktrace.c')
-rw-r--r--kernel/trace/blktrace.c26
1 files changed, 18 insertions, 8 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index af68a67179b4..21dea90eaa93 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -310,10 +310,20 @@ record_it:
local_irq_restore(flags);
}
-static void blk_trace_free(struct blk_trace *bt)
+static void blk_trace_free(struct request_queue *q, struct blk_trace *bt)
{
relay_close(bt->rchan);
- debugfs_remove(bt->dir);
+
+ /*
+ * If 'bt->dir' is not set, then both 'dropped' and 'msg' are created
+ * under 'q->debugfs_dir', thus lookup and remove them.
+ */
+ if (!bt->dir) {
+ debugfs_remove(debugfs_lookup("dropped", q->debugfs_dir));
+ debugfs_remove(debugfs_lookup("msg", q->debugfs_dir));
+ } else {
+ debugfs_remove(bt->dir);
+ }
free_percpu(bt->sequence);
free_percpu(bt->msg_data);
kfree(bt);
@@ -335,10 +345,10 @@ static void put_probe_ref(void)
mutex_unlock(&blk_probe_mutex);
}
-static void blk_trace_cleanup(struct blk_trace *bt)
+static void blk_trace_cleanup(struct request_queue *q, struct blk_trace *bt)
{
synchronize_rcu();
- blk_trace_free(bt);
+ blk_trace_free(q, bt);
put_probe_ref();
}
@@ -352,7 +362,7 @@ static int __blk_trace_remove(struct request_queue *q)
return -EINVAL;
if (bt->trace_state != Blktrace_running)
- blk_trace_cleanup(bt);
+ blk_trace_cleanup(q, bt);
return 0;
}
@@ -572,7 +582,7 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
ret = 0;
err:
if (ret)
- blk_trace_free(bt);
+ blk_trace_free(q, bt);
return ret;
}
@@ -1616,7 +1626,7 @@ static int blk_trace_remove_queue(struct request_queue *q)
put_probe_ref();
synchronize_rcu();
- blk_trace_free(bt);
+ blk_trace_free(q, bt);
return 0;
}
@@ -1647,7 +1657,7 @@ static int blk_trace_setup_queue(struct request_queue *q,
return 0;
free_bt:
- blk_trace_free(bt);
+ blk_trace_free(q, bt);
return ret;
}