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

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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: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Ursula Braun 2008-04-17 07:46:03 +02:00 committed by Heiko Carstens
parent d1e23375bf
commit 35b58b028d
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/cio/qdio.c
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@ -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) {