From: Weihang Li <liweihang@huawei.com>
To: <dledford@redhat.com>, <jgg@nvidia.com>
Cc: <leon@kernel.org>, <linux-rdma@vger.kernel.org>,
<linuxarm@huawei.com>, Weihang Li <liweihang@huawei.com>
Subject: [PATCH v3 for-next 09/13] RDMA/hns: Use refcount_t instead of atomic_t for SRQ reference counting
Date: Tue, 25 May 2021 14:51:40 +0800 [thread overview]
Message-ID: <1621925504-33019-10-git-send-email-liweihang@huawei.com> (raw)
In-Reply-To: <1621925504-33019-1-git-send-email-liweihang@huawei.com>
The refcount_t API will WARN on underflow and overflow of a reference
counter, and avoid use-after-free risks.
Signed-off-by: Weihang Li <liweihang@huawei.com>
---
drivers/infiniband/hw/hns/hns_roce_device.h | 2 +-
drivers/infiniband/hw/hns/hns_roce_srq.c | 8 ++++----
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index d90a39c..24d177c 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -473,7 +473,7 @@ struct hns_roce_srq {
u32 xrcdn;
void __iomem *db_reg;
- atomic_t refcount;
+ refcount_t refcount;
struct completion free;
struct hns_roce_mtr buf_mtr;
diff --git a/drivers/infiniband/hw/hns/hns_roce_srq.c b/drivers/infiniband/hw/hns/hns_roce_srq.c
index 546d182..327f7aa 100644
--- a/drivers/infiniband/hw/hns/hns_roce_srq.c
+++ b/drivers/infiniband/hw/hns/hns_roce_srq.c
@@ -17,7 +17,7 @@ void hns_roce_srq_event(struct hns_roce_dev *hr_dev, u32 srqn, int event_type)
xa_lock(&srq_table->xa);
srq = xa_load(&srq_table->xa, srqn & (hr_dev->caps.num_srqs - 1));
if (srq)
- atomic_inc(&srq->refcount);
+ refcount_inc(&srq->refcount);
xa_unlock(&srq_table->xa);
if (!srq) {
@@ -27,7 +27,7 @@ void hns_roce_srq_event(struct hns_roce_dev *hr_dev, u32 srqn, int event_type)
srq->event(srq, event_type);
- if (atomic_dec_and_test(&srq->refcount))
+ if (refcount_dec_and_test(&srq->refcount))
complete(&srq->free);
}
@@ -149,7 +149,7 @@ static void free_srqc(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
xa_erase(&srq_table->xa, srq->srqn);
- if (atomic_dec_and_test(&srq->refcount))
+ if (refcount_dec_and_test(&srq->refcount))
complete(&srq->free);
wait_for_completion(&srq->free);
@@ -417,7 +417,7 @@ int hns_roce_create_srq(struct ib_srq *ib_srq,
srq->db_reg = hr_dev->reg_base + SRQ_DB_REG;
srq->event = hns_roce_ib_srq_event;
- atomic_set(&srq->refcount, 1);
+ refcount_set(&srq->refcount, 1);
init_completion(&srq->free);
return 0;
--
2.7.4
next prev parent reply other threads:[~2021-05-25 6:52 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-25 6:51 [PATCH v3 for-next 00/13] RDMA: Use refcount_t for reference counting Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 01/13] RDMA/core: Use refcount_t instead of atomic_t on refcount of iwcm_id_private Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 02/13] RDMA/core: Use refcount_t instead of atomic_t on refcount of iwpm_admin_data Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 03/13] RDMA/core: Use refcount_t instead of atomic_t on refcount of ib_mad_snoop_private Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 04/13] RDMA/core: Use refcount_t instead of atomic_t on refcount of mcast_member Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 05/13] RDMA/core: Use refcount_t instead of atomic_t on refcount of mcast_port Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 06/13] RDMA/core: Use refcount_t instead of atomic_t on refcount of mcast_group Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 07/13] RDMA/core: Use refcount_t instead of atomic_t on refcount of ib_uverbs_device Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 08/13] RDMA/hns: Use refcount_t instead of atomic_t for CQ reference counting Weihang Li
2021-05-25 6:51 ` Weihang Li [this message]
2021-05-25 6:51 ` [PATCH v3 for-next 10/13] RDMA/hns: Use refcount_t instead of atomic_t for QP " Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 11/13] RDMA/cxgb4: Use refcount_t instead of atomic_t for " Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 12/13] RDMA/ipoib: " Weihang Li
2021-05-25 6:51 ` [PATCH v3 for-next 13/13] RDMA/rdmavt: Use refcount_t instead of atomic_t on refcount of rvt_mcast Weihang Li
2021-05-27 13:08 ` Marciniszyn, Mike
2021-05-27 13:15 ` Jason Gunthorpe
2021-05-28 3:58 ` liweihang
2021-05-28 7:01 ` Peter Zijlstra
2021-05-28 8:22 ` liweihang
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