| Message ID | 20211019082212.7052-1-pkushwaha@marvell.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Jason Gunthorpe |
| Headers | show |
| Series | [for-rc] rdma/qedr: Fix crash due to redundant release of device's qp memory | expand |
On Tue, Oct 19, 2021 at 11:22:12AM +0300, Prabhakar Kushwaha wrote: > Device's QP memory should only be allocated and released by IB layer. > This patch removes the redundant release of the device's qp memory > and uses completion APIs to make sure that .destroy_qp() only return, > when qp reference becomes 0. > > Fixes: 514aee660df4 ("RDMA: Globally allocate and release QP memory") > Acked-by: Michal Kalderon <michal.kalderon@marvell.com> > Signed-off-by: Ariel Elior <aelior@marvell.com> > Signed-off-by: Shai Malin <smalin@marvell.com> > Signed-off-by: Alok Prasad <palok@marvell.com> > Signed-off-by: Prabhakar Kushwaha <pkushwaha@marvell.com> > --- > drivers/infiniband/hw/qedr/qedr.h | 1 + > drivers/infiniband/hw/qedr/qedr_iw_cm.c | 2 +- > drivers/infiniband/hw/qedr/verbs.c | 5 ++++- > 3 files changed, 6 insertions(+), 2 deletions(-) Applied to for-rc, thanks Jason
diff --git a/drivers/infiniband/hw/qedr/qedr.h b/drivers/infiniband/hw/qedr/qedr.h index 3cb4febaad0f..8def88cfa300 100644 --- a/drivers/infiniband/hw/qedr/qedr.h +++ b/drivers/infiniband/hw/qedr/qedr.h @@ -455,6 +455,7 @@ struct qedr_qp { /* synchronization objects used with iwarp ep */ struct kref refcnt; struct completion iwarp_cm_comp; + struct completion qp_rel_comp; unsigned long iwarp_cm_flags; /* enum iwarp_cm_flags */ }; diff --git a/drivers/infiniband/hw/qedr/qedr_iw_cm.c b/drivers/infiniband/hw/qedr/qedr_iw_cm.c index 1715fbe0719d..a51fc6854984 100644 --- a/drivers/infiniband/hw/qedr/qedr_iw_cm.c +++ b/drivers/infiniband/hw/qedr/qedr_iw_cm.c @@ -83,7 +83,7 @@ static void qedr_iw_free_qp(struct kref *ref) { struct qedr_qp *qp = container_of(ref, struct qedr_qp, refcnt); - kfree(qp); + complete(&qp->qp_rel_comp); } static void diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c index 3fbf172dbbef..dcb3653db72d 100644 --- a/drivers/infiniband/hw/qedr/verbs.c +++ b/drivers/infiniband/hw/qedr/verbs.c @@ -1357,6 +1357,7 @@ static void qedr_set_common_qp_params(struct qedr_dev *dev, if (rdma_protocol_iwarp(&dev->ibdev, 1)) { kref_init(&qp->refcnt); init_completion(&qp->iwarp_cm_comp); + init_completion(&qp->qp_rel_comp); } qp->pd = pd; @@ -2857,8 +2858,10 @@ int qedr_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) qedr_free_qp_resources(dev, qp, udata); - if (rdma_protocol_iwarp(&dev->ibdev, 1)) + if (rdma_protocol_iwarp(&dev->ibdev, 1)) { qedr_iw_qp_rem_ref(&qp->ibqp); + wait_for_completion(&qp->qp_rel_comp); + } return 0; }
Device's QP memory should only be allocated and released by IB layer. This patch removes the redundant release of the device's qp memory and uses completion APIs to make sure that .destroy_qp() only return, when qp reference becomes 0. Fixes: 514aee660df4 ("RDMA: Globally allocate and release QP memory") Acked-by: Michal Kalderon <michal.kalderon@marvell.com> Signed-off-by: Ariel Elior <aelior@marvell.com> Signed-off-by: Shai Malin <smalin@marvell.com> Signed-off-by: Alok Prasad <palok@marvell.com> Signed-off-by: Prabhakar Kushwaha <pkushwaha@marvell.com> --- drivers/infiniband/hw/qedr/qedr.h | 1 + drivers/infiniband/hw/qedr/qedr_iw_cm.c | 2 +- drivers/infiniband/hw/qedr/verbs.c | 5 ++++- 3 files changed, 6 insertions(+), 2 deletions(-)