[S390] dasd: add ifcc handling

Adding interface control check (ifcc) handling in error recovery.
First retry up to 255 times and if all retries fail try an alternate
path if possible.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 6 insertions, 11 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index d640427c74c8..ab4f64c49829 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -1057,12 +1057,11 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
                 if (device->features & DASD_FEATURE_ERPLOG) {
                         dasd_log_sense(cqr, irb);
                 }
-                /* If we have no sense data, or we just don't want complex ERP
-                 * for this request, but if we have retries left, then just
-                 * reset this request and retry it in the fastpath
+                /*
+                 * If we don't want complex ERP for this request, then just
+                 * reset this and retry it in the fastpath
                  */
-                if (!(cqr->irb.esw.esw0.erw.cons &&
-                      test_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags)) &&
+                if (!test_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags) &&
                     cqr->retries > 0) {
                         DEV_MESSAGE(KERN_DEBUG, device,
                                     "default ERP in fastpath (%i retries left)",
@@ -1742,12 +1741,8 @@ restart:
 
                 /*  Process requests that may be recovered */
                 if (cqr->status == DASD_CQR_NEED_ERP) {
-                        if (cqr->irb.esw.esw0.erw.cons &&
-                            test_bit(DASD_CQR_FLAGS_USE_ERP,
-                                     &cqr->flags)) {
-                                erp_fn = base->discipline->erp_action(cqr);
-                                erp_fn(cqr);
-                        }
+                        erp_fn = base->discipline->erp_action(cqr);
+                        erp_fn(cqr);
                         goto restart;
                 }