All of lore.kernel.org
 help / color / mirror / Atom feed
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 v2 for-next 08/17] RDMA/hns: Use refcount_t instead of atomic_t for CQ reference counting
Date: Fri, 21 May 2021 17:53:36 +0800	[thread overview]
Message-ID: <1621590825-60693-9-git-send-email-liweihang@huawei.com> (raw)
In-Reply-To: <1621590825-60693-1-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_cq.c     | 8 ++++----
 drivers/infiniband/hw/hns/hns_roce_device.h | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_cq.c b/drivers/infiniband/hw/hns/hns_roce_cq.c
index 488d86b..1422bdc 100644
--- a/drivers/infiniband/hw/hns/hns_roce_cq.c
+++ b/drivers/infiniband/hw/hns/hns_roce_cq.c
@@ -154,7 +154,7 @@ static int alloc_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
 	hr_cq->cons_index = 0;
 	hr_cq->arm_sn = 1;
 
-	atomic_set(&hr_cq->refcount, 1);
+	refcount_set(&hr_cq->refcount, 1);
 	init_completion(&hr_cq->free);
 
 	return 0;
@@ -188,7 +188,7 @@ static void free_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
 	synchronize_irq(hr_dev->eq_table.eq[hr_cq->vector].irq);
 
 	/* wait for all interrupt processed */
-	if (atomic_dec_and_test(&hr_cq->refcount))
+	if (refcount_dec_and_test(&hr_cq->refcount))
 		complete(&hr_cq->free);
 	wait_for_completion(&hr_cq->free);
 
@@ -480,7 +480,7 @@ void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type)
 		return;
 	}
 
-	atomic_inc(&hr_cq->refcount);
+	refcount_inc(&hr_cq->refcount);
 
 	ibcq = &hr_cq->ib_cq;
 	if (ibcq->event_handler) {
@@ -490,7 +490,7 @@ void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type)
 		ibcq->event_handler(&event, ibcq->cq_context);
 	}
 
-	if (atomic_dec_and_test(&hr_cq->refcount))
+	if (refcount_dec_and_test(&hr_cq->refcount))
 		complete(&hr_cq->free);
 }
 
diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index 111cab5..d90a39c 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -446,7 +446,7 @@ struct hns_roce_cq {
 	int				cqe_size;
 	unsigned long			cqn;
 	u32				vector;
-	atomic_t			refcount;
+	refcount_t			refcount;
 	struct completion		free;
 	struct list_head		sq_list; /* all qps on this send cq */
 	struct list_head		rq_list; /* all qps on this recv cq */
-- 
2.7.4


  parent reply	other threads:[~2021-05-21  9:55 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-21  9:53 [PATCH v2 for-next 00/17] RDMA: Use refcount_t for reference counting Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 01/17] RDMA/core: Use refcount_t instead of atomic_t on refcount of iwcm_id_private Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 02/17] RDMA/core: Use refcount_t instead of atomic_t on refcount of iwpm_admin_data Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 03/17] RDMA/core: Use refcount_t instead of atomic_t on refcount of ib_mad_snoop_private Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 04/17] RDMA/core: Use refcount_t instead of atomic_t on refcount of mcast_member Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 05/17] RDMA/core: Use refcount_t instead of atomic_t on refcount of mcast_port Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 06/17] RDMA/core: Use refcount_t instead of atomic_t on refcount of mcast_group Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 07/17] RDMA/core: Use refcount_t instead of atomic_t on refcount of ib_uverbs_device Weihang Li
2021-05-21  9:53 ` Weihang Li [this message]
2021-05-21  9:53 ` [PATCH v2 for-next 09/17] RDMA/hns: Use refcount_t instead of atomic_t for SRQ reference counting Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 10/17] RDMA/hns: Use refcount_t instead of atomic_t for QP " Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 11/17] RDMA/cxgb4: Use refcount_t instead of atomic_t for " Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 12/17] RDMA/i40iw: Use refcount_t instead of atomic_t on refcount of i40iw_cqp_request Weihang Li
2021-05-22  9:41   ` Zhu Yanjun
2021-05-24  1:50     ` liweihang
2021-05-21  9:53 ` [PATCH v2 for-next 13/17] RDMA/i40iw: Use refcount_t instead of atomic_t on refcount of i40iw_cm_listener Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 14/17] RDMA/i40iw: Use refcount_t instead of atomic_t on refcount of i40iw_puda_buf Weihang Li
2021-05-22  9:42   ` Zhu Yanjun
2021-05-21  9:53 ` [PATCH v2 for-next 15/17] RDMA/i40iw: Use refcount_t instead of atomic_t on refcount of i40iw_cm_node Weihang Li
2021-05-22  9:40   ` Zhu Yanjun
2021-05-21  9:53 ` [PATCH v2 for-next 16/17] RDMA/ipoib: Use refcount_t instead of atomic_t for reference counting Weihang Li
2021-05-21  9:53 ` [PATCH v2 for-next 17/17] RDMA/rdmavt: Use refcount_t instead of atomic_t on refcount of rvt_mcast Weihang Li

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1621590825-60693-9-git-send-email-liweihang@huawei.com \
    --to=liweihang@huawei.com \
    --cc=dledford@redhat.com \
    --cc=jgg@nvidia.com \
    --cc=leon@kernel.org \
    --cc=linux-rdma@vger.kernel.org \
    --cc=linuxarm@huawei.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.