Commit 35b58b02 authored Apr 17, 2008 by Ursula Braun Committed by Heiko Carstens Apr 17, 2008

[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: 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>

parent d1e23375

drivers/s390/cio/qdio.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -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.		* q->dev_st_chg_ind is the indicator, be it shared or not.
	* only clear it, if indicator is non-shared		* 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);		tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);

	if (q->hydra_gives_outbound_pcis) {		if (q->hydra_gives_outbound_pcis) {