}
}
+/*
+ * check if device should be autoquiesced due to too many timeouts
+ */
+static void __dasd_device_check_autoquiesce_timeout(struct dasd_device *device,
+ struct dasd_ccw_req *cqr)
+{
+ if ((device->default_retries - cqr->retries) >= device->aq_timeouts)
+ dasd_handle_autoquiesce(device, cqr, DASD_EER_TIMEOUTS);
+}
+
/*
* Take a look at the first request on the ccw queue and check
* if it reached its expire time. If so, terminate the IO.
"remaining\n", cqr, (cqr->expires/HZ),
cqr->retries);
}
+ __dasd_device_check_autoquiesce_timeout(device, cqr);
}
}
static DEVICE_ATTR(aq_requeue, 0644, dasd_aqr_show, dasd_aqr_store);
+/*
+ * aq_timeouts controls how much retries have to time out until
+ * a device gets autoquiesced
+ */
+static ssize_t
+dasd_aq_timeouts_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct dasd_device *device;
+ int len;
+
+ device = dasd_device_from_cdev(to_ccwdev(dev));
+ if (IS_ERR(device))
+ return -ENODEV;
+ len = sysfs_emit(buf, "%u\n", device->aq_timeouts);
+ dasd_put_device(device);
+ return len;
+}
+
+static ssize_t
+dasd_aq_timeouts_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct dasd_device *device;
+ unsigned int val;
+
+ device = dasd_device_from_cdev(to_ccwdev(dev));
+ if (IS_ERR(device))
+ return -ENODEV;
+
+ if ((kstrtouint(buf, 10, &val) != 0) ||
+ val > DASD_RETRIES_MAX || val == 0) {
+ dasd_put_device(device);
+ return -EINVAL;
+ }
+
+ if (val)
+ device->aq_timeouts = val;
+
+ dasd_put_device(device);
+ return count;
+}
+
+static DEVICE_ATTR(aq_timeouts, 0644, dasd_aq_timeouts_show,
+ dasd_aq_timeouts_store);
+
/*
* expiration time for default requests
*/
&dev_attr_ping.attr,
&dev_attr_aq_mask.attr,
&dev_attr_aq_requeue.attr,
+ &dev_attr_aq_timeouts.attr,
NULL,
};