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Commit 099a884b authored by Mike Marciniszyn's avatar Mike Marciniszyn Committed by Doug Ledford
Browse files

IB/hfi1: Handle wakeup of orphaned QPs for pio 



Once a send context is taken down due to a link failure, any QPs waiting
for pio credits will stay on the waitlist indefinitely.

Fix by wakeing up all QPs linked to piowait list.

Fixes: 77241056 ("IB/hfi1: add driver files")
Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent f972775b

drivers/infiniband/hw/hfi1/pio.c

+16 −0
Original line number Diff line number Diff line
@@ -952,6 +952,22 @@ void sc_disable(struct send_context *sc) 
		}

	}

	spin_unlock(&sc->release_lock);



	write_seqlock(&sc->waitlock);

	while (!list_empty(&sc->piowait)) {

		struct iowait *wait;

		struct rvt_qp *qp;

		struct hfi1_qp_priv *priv;



		wait = list_first_entry(&sc->piowait, struct iowait, list);

		qp = iowait_to_qp(wait);

		priv = qp->priv;

		list_del_init(&priv->s_iowait.list);

		priv->s_iowait.lock = NULL;

		hfi1_qp_wakeup(qp, RVT_S_WAIT_PIO | HFI1_S_WAIT_PIO_DRAIN);

	}

	write_sequnlock(&sc->waitlock);



	spin_unlock_irq(&sc->alloc_lock);

}