[S390] cio: inform user when online/offline processing fails

Print a warning message in case a ccw device enters boxed or
not operational state during online/offline processing.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 1674467..ee34506 100644 (file)
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -7,6 +7,10 @@
  *              Cornelia Huck (cornelia.huck@de.ibm.com)
  *              Martin Schwidefsky (schwidefsky@de.ibm.com)
  */
+
+#define KMSG_COMPONENT "cio"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/spinlock.h>
@@ -347,6 +351,14 @@ int ccw_device_set_offline(struct ccw_device *cdev)
        spin_unlock_irq(cdev->ccwlock);
        wait_event(cdev->private->wait_q, (dev_fsm_final_state(cdev) ||
                   cdev->private->state == DEV_STATE_DISCONNECTED));
+       /* Inform the user if set offline failed. */
+       if (cdev->private->state == DEV_STATE_BOXED) {
+               pr_warning("%s: The device entered boxed state while "
+                          "being set offline\n", dev_name(&cdev->dev));
+       } else if (cdev->private->state == DEV_STATE_NOT_OPER) {
+               pr_warning("%s: The device stopped operating while "
+                          "being set offline\n", dev_name(&cdev->dev));
+       }
        /* Give up reference from ccw_device_set_online(). */
        put_device(&cdev->dev);
        return 0;
@@ -407,6 +419,16 @@ int ccw_device_set_online(struct ccw_device *cdev)
        if ((cdev->private->state != DEV_STATE_ONLINE) &&
            (cdev->private->state != DEV_STATE_W4SENSE)) {
                spin_unlock_irq(cdev->ccwlock);
+               /* Inform the user that set online failed. */
+               if (cdev->private->state == DEV_STATE_BOXED) {
+                       pr_warning("%s: Setting the device online failed "
+                                  "because it is boxed\n",
+                                  dev_name(&cdev->dev));
+               } else if (cdev->private->state == DEV_STATE_NOT_OPER) {
+                       pr_warning("%s: Setting the device online failed "
+                                  "because it is not operational\n",
+                                  dev_name(&cdev->dev));
+               }
                /* Give up online reference since onlining failed. */
                put_device(&cdev->dev);
                return -ENODEV;