Add mdelay failure test

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/mdelay-workqueue.c b/mdelay-workqueue.c
new file mode 100644
index 0000000..4094831
--- /dev/null
+++ b/mdelay-workqueue.c
@@ -0,0 +1,64 @@
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/module.h>
+#include <linux/printk.h>
+#include <linux/workqueue.h>
+
+#define TIMER_DELAY 1
+static struct workqueue_struct *gwq;
+static struct work_struct gwork;
+
+struct timer_list timer;
+static int total_works = 1000, total_works_finished = 1;
+
+DECLARE_COMPLETION(wq_complete);
+
+void timer_fn(unsigned long data)
+{
+	queue_work_on(0, gwq, &gwork);
+}
+
+static void wq_handler(struct work_struct *_work)
+{
+	if (total_works_finished++ == total_works) {
+		complete(&wq_complete);
+		return;
+	}
+
+	mdelay(90);
+
+	timer.expires = jiffies + TIMER_DELAY;
+	add_timer_on(&timer, 0);
+}
+
+static int __init wq_module_init(void)
+{
+	gwq = alloc_workqueue("wq-test", 0, 0);
+	if (!gwq) {
+		pr_err("Failed to allocate workqueue\n");
+		return 0;
+	}
+
+	INIT_WORK(&gwork, wq_handler);
+
+	init_timer(&timer);
+	timer.expires = jiffies + TIMER_DELAY;
+	timer.function = timer_fn;
+
+	add_timer_on(&timer, 0);
+
+	wait_for_completion_interruptible(&wq_complete);
+	return 0;
+}
+module_init(wq_module_init);
+
+static void __exit wq_module_exit(void)
+{
+	destroy_workqueue(gwq);
+}
+module_exit(wq_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
+MODULE_DESCRIPTION("Workqueue Analyser");