ntb_perf: Wait for link before running test
Instead of returning immediately with an error when the link is
down, wait for the link to come up (or the user sends a SIGINT).
This is to make scripting ntb_perf easier.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c
index 05a8705..f0784e5 100644
--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -135,6 +135,7 @@
bool link_is_up;
struct work_struct link_cleanup;
struct delayed_work link_work;
+ wait_queue_head_t link_wq;
struct dentry *debugfs_node_dir;
struct dentry *debugfs_run;
struct dentry *debugfs_threads;
@@ -533,6 +534,7 @@
goto out1;
perf->link_is_up = true;
+ wake_up(&perf->link_wq);
return;
@@ -653,7 +655,7 @@
int node, i;
DECLARE_WAIT_QUEUE_HEAD(wq);
- if (!perf->link_is_up)
+ if (wait_event_interruptible(perf->link_wq, perf->link_is_up))
return -ENOLINK;
if (perf->perf_threads == 0)
@@ -783,6 +785,7 @@
mutex_init(&perf->run_mutex);
spin_lock_init(&perf->db_lock);
perf_setup_mw(ntb, perf);
+ init_waitqueue_head(&perf->link_wq);
INIT_DELAYED_WORK(&perf->link_work, perf_link_work);
INIT_WORK(&perf->link_cleanup, perf_link_cleanup);