[PATCH] s390: V=V qdio fixes
Using FCP devices with V=V support, the input queue stalled when CCQ 97 had
been returned in qdio_do_eqbs. When this happen we have to reissue the eqbs
instruction.
Another bug was when V=V was enabled we checked if hardware has SIGA-sync
support. If not we returned with 0 from tiqdio_is_inbound_q_done. Thus qdio
lost initiative on FCP devices and input queue stalled. Running devices in
V=V there is no SIGA-sync support but nevertheless we have to process
tiqdio_is_inbound_q_done either.
Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c
index 45ce032..9ed37dc 100644
--- a/drivers/s390/cio/qdio.c
+++ b/drivers/s390/cio/qdio.c
@@ -165,8 +165,13 @@
q_no = q->q_no;
if(!q->is_input_q)
q_no += irq->no_input_qs;
+again:
ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
rc = qdio_check_ccq(q, ccq);
+ if (rc == 1) {
+ QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
+ goto again;
+ }
if (rc < 0) {
QDIO_DBF_TEXT2(1,trace,"eqberr");
sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
@@ -195,8 +200,13 @@
q_no = q->q_no;
if(!q->is_input_q)
q_no += irq->no_input_qs;
+again:
ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
rc = qdio_check_ccq(q, ccq);
+ if (rc == 1) {
+ QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
+ goto again;
+ }
if (rc < 0) {
QDIO_DBF_TEXT3(1,trace,"sqberr");
sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt,*cnt,ccq,q_no);
@@ -1187,8 +1197,7 @@
if (!no_used)
return 1;
-
- if (!q->siga_sync)
+ if (!q->siga_sync && !irq->is_qebsm)
/* we'll check for more primed buffers in qeth_stop_polling */
return 0;
if (irq->is_qebsm) {