dasd: fix error recovery for alias devices during format
Kernel panic or a hanging device during format if an alias device is
set offline or I/O errors occur.
Omit the error recovery procedure for alias devices and do retries on
the base device with full erp.
Signed-off-by: Stefan Haberland <stefan.haberland@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 925b056..5df05f2 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2307,17 +2307,27 @@
rc = 0;
list_for_each_entry_safe(cqr, n, ccw_queue, blocklist) {
- if (__dasd_sleep_on_erp(cqr)) {
- if (!cqr->status == DASD_CQR_TERMINATED &&
- !cqr->status == DASD_CQR_NEED_ERP)
- break;
- rc = 1;
+ /*
+ * for alias devices simplify error recovery and
+ * return to upper layer
+ */
+ if (cqr->startdev != cqr->basedev &&
+ (cqr->status == DASD_CQR_TERMINATED ||
+ cqr->status == DASD_CQR_NEED_ERP))
+ return -EAGAIN;
+ else {
+ /* normal recovery for basedev IO */
+ if (__dasd_sleep_on_erp(cqr)) {
+ if (!cqr->status == DASD_CQR_TERMINATED &&
+ !cqr->status == DASD_CQR_NEED_ERP)
+ break;
+ rc = 1;
+ }
}
}
if (rc)
goto retry;
-
return 0;
}