[S390] Enhanced handling of failed termination requests.

In case a request timed out and termination did not work, the console was
flooded with retry messages (every 1/10s). Now we use a 5s delay per retry and
generate a more precise message.

Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 79ffef6..a2cef57 100644 (file)
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -1264,15 +1264,21 @@ __dasd_check_expire(struct dasd_device * device)
        if (list_empty(&device->ccw_queue))
                return;
        cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, list);
-       if (cqr->status == DASD_CQR_IN_IO && cqr->expires != 0) {
-               if (time_after_eq(jiffies, cqr->expires + cqr->starttime)) {
+       if ((cqr->status == DASD_CQR_IN_IO && cqr->expires != 0) &&
+           (time_after_eq(jiffies, cqr->expires + cqr->starttime))) {
+               if (device->discipline->term_IO(cqr) != 0) {
+                       /* Hmpf, try again in 5 sec */
+                       dasd_set_timer(device, 5*HZ);
+                       DEV_MESSAGE(KERN_ERR, device,
+                                   "internal error - timeout (%is) expired "
+                                   "for cqr %p, termination failed, "
+                                   "retrying in 5s",
+                                   (cqr->expires/HZ), cqr);
+               } else {
                        DEV_MESSAGE(KERN_ERR, device,
                                    "internal error - timeout (%is) expired "
                                    "for cqr %p (%i retries left)",
                                    (cqr->expires/HZ), cqr, cqr->retries);
-                       if (device->discipline->term_IO(cqr) != 0)
-                               /* Hmpf, try again in 1/10 sec */
-                               dasd_set_timer(device, 10);
                }
        }
 }