IB/qib: Fix QP RCU sparse warnings
Commit af061a644a
("IB/qib: Use RCU for qpn lookup") introduced sparse
warnings.
This patch corrects those issues.
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
parent
7e23017704
commit
1fb9fed6d4
5 changed files with 61 additions and 35 deletions
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@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2008, 2009, 2010 QLogic Corporation. All rights reserved.
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* Copyright (c) 2012 Intel Corporation. All rights reserved.
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* Copyright (c) 2008 - 2012 QLogic Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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@ -49,6 +50,7 @@
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#include "qib_qsfp.h"
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#include "qib_mad.h"
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#include "qib_verbs.h"
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static void qib_setup_7322_setextled(struct qib_pportdata *, u32);
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static void qib_7322_handle_hwerrors(struct qib_devdata *, char *, size_t);
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@ -5151,15 +5153,11 @@ static void try_7322_ipg(struct qib_pportdata *ppd)
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goto retry;
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if (!ibp->smi_ah) {
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struct ib_ah_attr attr;
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struct ib_ah *ah;
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memset(&attr, 0, sizeof attr);
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attr.dlid = be16_to_cpu(IB_LID_PERMISSIVE);
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attr.port_num = ppd->port;
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ah = ib_create_ah(ibp->qp0->ibqp.pd, &attr);
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ah = qib_create_qp0_ah(ibp, be16_to_cpu(IB_LID_PERMISSIVE));
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if (IS_ERR(ah))
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ret = -EINVAL;
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ret = PTR_ERR(ah);
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else {
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send_buf->ah = ah;
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ibp->smi_ah = to_iah(ah);
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
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* All rights reserved.
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* Copyright (c) 2012 Intel Corporation. All rights reserved.
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* Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
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* Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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@ -90,14 +90,10 @@ static void qib_send_trap(struct qib_ibport *ibp, void *data, unsigned len)
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if (!ibp->sm_ah) {
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if (ibp->sm_lid != be16_to_cpu(IB_LID_PERMISSIVE)) {
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struct ib_ah *ah;
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struct ib_ah_attr attr;
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memset(&attr, 0, sizeof attr);
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attr.dlid = ibp->sm_lid;
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attr.port_num = ppd_from_ibp(ibp)->port;
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ah = ib_create_ah(ibp->qp0->ibqp.pd, &attr);
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ah = qib_create_qp0_ah(ibp, ibp->sm_lid);
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if (IS_ERR(ah))
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ret = -EINVAL;
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ret = PTR_ERR(ah);
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else {
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send_buf->ah = ah;
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ibp->sm_ah = to_iah(ah);
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
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* All rights reserved.
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* Copyright (c) 2012 Intel Corporation. All rights reserved.
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* Copyright (c) 2006 - 2012 QLogic Corporation. * All rights reserved.
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* Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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@ -250,23 +250,33 @@ static void remove_qp(struct qib_ibdev *dev, struct qib_qp *qp)
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spin_lock_irqsave(&dev->qpt_lock, flags);
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if (ibp->qp0 == qp) {
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if (rcu_dereference_protected(ibp->qp0,
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lockdep_is_held(&dev->qpt_lock)) == qp) {
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atomic_dec(&qp->refcount);
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rcu_assign_pointer(ibp->qp0, NULL);
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} else if (ibp->qp1 == qp) {
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} else if (rcu_dereference_protected(ibp->qp1,
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lockdep_is_held(&dev->qpt_lock)) == qp) {
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atomic_dec(&qp->refcount);
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rcu_assign_pointer(ibp->qp1, NULL);
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} else {
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struct qib_qp *q, **qpp;
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struct qib_qp *q;
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struct qib_qp __rcu **qpp;
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qpp = &dev->qp_table[n];
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for (; (q = *qpp) != NULL; qpp = &q->next)
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q = rcu_dereference_protected(*qpp,
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lockdep_is_held(&dev->qpt_lock));
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for (; q; qpp = &q->next) {
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if (q == qp) {
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atomic_dec(&qp->refcount);
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rcu_assign_pointer(*qpp, qp->next);
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qp->next = NULL;
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*qpp = qp->next;
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rcu_assign_pointer(qp->next, NULL);
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q = rcu_dereference_protected(*qpp,
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lockdep_is_held(&dev->qpt_lock));
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break;
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}
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q = rcu_dereference_protected(*qpp,
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lockdep_is_held(&dev->qpt_lock));
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}
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}
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spin_unlock_irqrestore(&dev->qpt_lock, flags);
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@ -302,10 +312,12 @@ unsigned qib_free_all_qps(struct qib_devdata *dd)
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spin_lock_irqsave(&dev->qpt_lock, flags);
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for (n = 0; n < dev->qp_table_size; n++) {
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qp = dev->qp_table[n];
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qp = rcu_dereference_protected(dev->qp_table[n],
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lockdep_is_held(&dev->qpt_lock));
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rcu_assign_pointer(dev->qp_table[n], NULL);
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for (; qp; qp = qp->next)
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for (; qp; qp = rcu_dereference_protected(qp->next,
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lockdep_is_held(&dev->qpt_lock)))
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qp_inuse++;
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}
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spin_unlock_irqrestore(&dev->qpt_lock, flags);
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@ -337,7 +349,8 @@ struct qib_qp *qib_lookup_qpn(struct qib_ibport *ibp, u32 qpn)
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unsigned n = qpn_hash(dev, qpn);
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rcu_read_lock();
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for (qp = dev->qp_table[n]; rcu_dereference(qp); qp = qp->next)
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for (qp = rcu_dereference(dev->qp_table[n]); qp;
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qp = rcu_dereference(qp->next))
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if (qp->ibqp.qp_num == qpn)
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break;
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}
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
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* All rights reserved.
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* Copyright (c) 2012 Intel Corporation. All rights reserved.
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* Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
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* Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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@ -1845,6 +1845,23 @@ static struct ib_ah *qib_create_ah(struct ib_pd *pd,
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return ret;
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}
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struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid)
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{
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struct ib_ah_attr attr;
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struct ib_ah *ah = ERR_PTR(-EINVAL);
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struct qib_qp *qp0;
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memset(&attr, 0, sizeof attr);
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attr.dlid = dlid;
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attr.port_num = ppd_from_ibp(ibp)->port;
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rcu_read_lock();
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qp0 = rcu_dereference(ibp->qp0);
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if (qp0)
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ah = ib_create_ah(qp0->ibqp.pd, &attr);
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rcu_read_unlock();
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return ah;
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}
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/**
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* qib_destroy_ah - destroy an address handle
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* @ibah: the AH to destroy
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@ -2060,7 +2077,7 @@ int qib_register_ib_device(struct qib_devdata *dd)
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spin_lock_init(&dev->lk_table.lock);
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dev->lk_table.max = 1 << ib_qib_lkey_table_size;
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lk_tab_size = dev->lk_table.max * sizeof(*dev->lk_table.table);
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dev->lk_table.table = (struct qib_mregion **)
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dev->lk_table.table = (struct qib_mregion __rcu **)
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__get_free_pages(GFP_KERNEL, get_order(lk_tab_size));
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if (dev->lk_table.table == NULL) {
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ret = -ENOMEM;
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
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* All rights reserved.
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* Copyright (c) 2012 Intel Corporation. All rights reserved.
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* Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
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* Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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@ -420,7 +420,7 @@ struct qib_qp {
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/* read mostly fields above and below */
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struct ib_ah_attr remote_ah_attr;
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struct ib_ah_attr alt_ah_attr;
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struct qib_qp *next; /* link list for QPN hash table */
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struct qib_qp __rcu *next; /* link list for QPN hash table */
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struct qib_swqe *s_wq; /* send work queue */
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struct qib_mmap_info *ip;
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struct qib_ib_header *s_hdr; /* next packet header to send */
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@ -659,8 +659,8 @@ struct qib_opcode_stats {
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};
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struct qib_ibport {
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struct qib_qp *qp0;
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struct qib_qp *qp1;
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struct qib_qp __rcu *qp0;
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struct qib_qp __rcu *qp1;
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struct ib_mad_agent *send_agent; /* agent for SMI (traps) */
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struct qib_ah *sm_ah;
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struct qib_ah *smi_ah;
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@ -743,7 +743,7 @@ struct qib_ibdev {
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struct list_head memwait; /* list for wait kernel memory */
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struct list_head txreq_free;
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struct timer_list mem_timer;
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struct qib_qp **qp_table;
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struct qib_qp __rcu **qp_table;
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struct qib_pio_header *pio_hdrs;
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dma_addr_t pio_hdrs_phys;
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/* list of QPs waiting for RNR timer */
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@ -937,6 +937,8 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr,
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int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
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struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid);
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void qib_rc_rnr_retry(unsigned long arg);
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void qib_rc_send_complete(struct qib_qp *qp, struct qib_ib_header *hdr);
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