Commit 26dc638a authored by Logan Gunthorpe's avatar Logan Gunthorpe Committed by Jon Mason
Browse files

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: default avatarLogan Gunthorpe <>
Acked-by: default avatarDave Jiang <>
Signed-off-by: default avatarJon Mason <>
parent 58fd0f3b
......@@ -135,6 +135,7 @@ struct perf_ctx {
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 @@ static void perf_link_work(struct work_struct *work)
goto out1;
perf->link_is_up = true;
......@@ -653,7 +655,7 @@ static ssize_t debugfs_run_write(struct file *filp, const char __user *ubuf,
int node, i;
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 @@ static int perf_probe(struct ntb_client *client, struct ntb_dev *ntb)
perf_setup_mw(ntb, perf);
INIT_DELAYED_WORK(&perf->link_work, perf_link_work);
INIT_WORK(&perf->link_cleanup, perf_link_cleanup);
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