From 6f7bc01a7382641c61ec036d68ff3a9140b48a1c Mon Sep 17 00:00:00 2001 From: Stefan Roscher Date: Mon, 14 Jul 2008 23:48:47 -0700 Subject: IB/ehca: In case of lost interrupts, trigger EOI to reenable interrupts During corner case testing, we noticed that some versions of ehca do not properly transition to interrupt done in special load situations. This can be resolved by periodically triggering EOI through H_EOI, if EQEs are pending. Signed-off-by: Stefan Roscher Acked-by: Benjamin Herrenschmidt Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ehca/ehca_irq.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'drivers/infiniband/hw/ehca/ehca_irq.c') diff --git a/drivers/infiniband/hw/ehca/ehca_irq.c b/drivers/infiniband/hw/ehca/ehca_irq.c index ce1ab0571be3..0792d930c481 100644 --- a/drivers/infiniband/hw/ehca/ehca_irq.c +++ b/drivers/infiniband/hw/ehca/ehca_irq.c @@ -531,7 +531,7 @@ void ehca_process_eq(struct ehca_shca *shca, int is_irq) { struct ehca_eq *eq = &shca->eq; struct ehca_eqe_cache_entry *eqe_cache = eq->eqe_cache; - u64 eqe_value; + u64 eqe_value, ret; unsigned long flags; int eqe_cnt, i; int eq_empty = 0; @@ -583,8 +583,13 @@ void ehca_process_eq(struct ehca_shca *shca, int is_irq) ehca_dbg(&shca->ib_device, "No eqe found for irq event"); goto unlock_irq_spinlock; - } else if (!is_irq) + } else if (!is_irq) { + ret = hipz_h_eoi(eq->ist); + if (ret != H_SUCCESS) + ehca_err(&shca->ib_device, + "bad return code EOI -rc = %ld\n", ret); ehca_dbg(&shca->ib_device, "deadman found %x eqe", eqe_cnt); + } if (unlikely(eqe_cnt == EHCA_EQE_CACHE_SIZE)) ehca_dbg(&shca->ib_device, "too many eqes for one irq event"); /* enable irq for new packets */ -- cgit v1.2.3-59-g8ed1b