[S390] qdio: Unrecognized inbound traffic if many FCP devices are online

Problem:
Usually every FCP device has its own indicator field the adapter
uses to signal outstanding work. Once a certain limit of devices
is reached, a common indicator field is used. In certain scenarios
qdio resets this common indicator field, but handles only part of
the FCP-devices sharing the common indicator field. Thus inbound
traffic on the non-processed shared FCP-devices is not recognized
immediately.

Solution:
Make sure common indicator field is reset only, if all FCP-devices
sharing the indicator are processed.
Signed-off-by: NUrsula Braun <braunu@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>

drivers/s390/cio/qdio.c

@@ -1399,7 +1399,7 @@ __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
 	 * q->dev_st_chg_ind is the indicator, be it shared or not.
 	 * only clear it, if indicator is non-shared
 	 */
-	if (!spare_ind_was_set)
+	if (q->dev_st_chg_ind != &spare_indicator)
 		tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
 
 	if (q->hydra_gives_outbound_pcis) {