From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: [PATCH AUTOSEL 5.1 81/95] IB/hfi1: Handle wakeup of orphaned QPs for pio Date: Wed, 26 Jun 2019 20:30:06 -0400 Message-ID: <20190627003021.19867-81-sashal@kernel.org> References: <20190627003021.19867-1-sashal@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190627003021.19867-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mike Marciniszyn , Dennis Dalessandro , Doug Ledford , Sasha Levin , linux-rdma@vger.kernel.org List-Id: linux-rdma@vger.kernel.org From: Mike Marciniszyn [ Upstream commit 099a884ba4c00145cef283d36e050726311c2e95 ] 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: 7724105686e7 ("IB/hfi1: add driver files") Reviewed-by: Dennis Dalessandro Signed-off-by: Mike Marciniszyn Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hfi1/pio.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/infiniband/hw/hfi1/pio.c b/drivers/infiniband/hw/hfi1/pio.c index a1de566fe95e..1ee47838d4de 100644 --- a/drivers/infiniband/hw/hfi1/pio.c +++ b/drivers/infiniband/hw/hfi1/pio.c @@ -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); } -- 2.20.1