+ megasas_sysfs_set_dbg_lvl);
+
+static ssize_t
+megasas_sysfs_show_poll_mode_io(struct device_driver *dd, char *buf)
+{
+ return sprintf(buf, "%u\n", poll_mode_io);
+}
+
+static ssize_t
+megasas_sysfs_set_poll_mode_io(struct device_driver *dd,
+ const char *buf, size_t count)
+{
+ int retval = count;
+ int tmp = poll_mode_io;
+ int i;
+ struct megasas_instance *instance;
+
+ if (sscanf(buf, "%u", &poll_mode_io) < 1) {
+ printk(KERN_ERR "megasas: could not set poll_mode_io\n");
+ retval = -EINVAL;
+ }
+
+ /*
+ * Check if poll_mode_io is already set or is same as previous value
+ */
+ if ((tmp && poll_mode_io) || (tmp == poll_mode_io))
+ goto out;
+
+ if (poll_mode_io) {
+ /*
+ * Start timers for all adapters
+ */
+ for (i = 0; i < megasas_mgmt_info.max_index; i++) {
+ instance = megasas_mgmt_info.instance[i];
+ if (instance) {
+ megasas_start_timer(instance,
+ &instance->io_completion_timer,
+ megasas_io_completion_timer,
+ MEGASAS_COMPLETION_TIMER_INTERVAL);
+ }
+ }
+ } else {
+ /*
+ * Delete timers for all adapters
+ */
+ for (i = 0; i < megasas_mgmt_info.max_index; i++) {
+ instance = megasas_mgmt_info.instance[i];
+ if (instance)
+ del_timer_sync(&instance->io_completion_timer);
+ }
+ }
+
+out:
+ return retval;
+}
+
+static DRIVER_ATTR(poll_mode_io, S_IRUGO|S_IWUGO,
+ megasas_sysfs_show_poll_mode_io,
+ megasas_sysfs_set_poll_mode_io);