From: Mike Marciniszyn Date: Fri, 14 Jun 2019 16:33:00 +0000 (-0400) Subject: IB/hfi1: Handle wakeup of orphaned QPs for pio X-Git-Tag: v5.15~6132^2~3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=099a884ba4c00145cef283d36e050726311c2e95;p=platform%2Fkernel%2Flinux-starfive.git 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: 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 --- diff --git a/drivers/infiniband/hw/hfi1/pio.c b/drivers/infiniband/hw/hfi1/pio.c index 16ba9d5..66cf2b1 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); }