[PATCH rdma-next 50/50] RDMA/mthca: Use generic resize-CQ lock

[Leon Romanovsky]

From: Leon Romanovsky <leonro@xxxxxxxxxx>

Replace the open‑coded resize‑CQ lock with the standard core
implementation for better consistency and maintainability.

Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
---
 drivers/infiniband/hw/mthca/mthca_cq.c       |  1 -
 drivers/infiniband/hw/mthca/mthca_provider.c | 20 ++++++--------------
 drivers/infiniband/hw/mthca/mthca_provider.h |  1 -
 3 files changed, 6 insertions(+), 16 deletions(-)

diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c b/drivers/infiniband/hw/mthca/mthca_cq.c
index 26c3408dcaca..9c15e9b886d1 100644
--- a/drivers/infiniband/hw/mthca/mthca_cq.c
+++ b/drivers/infiniband/hw/mthca/mthca_cq.c
@@ -819,7 +819,6 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
 	spin_lock_init(&cq->lock);
 	cq->refcount = 1;
 	init_waitqueue_head(&cq->wait);
-	mutex_init(&cq->mutex);
 
 	memset(cq_context, 0, sizeof *cq_context);
 	cq_context->flags           = cpu_to_be32(MTHCA_CQ_STATUS_OK      |
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 85de004547ab..cb94d73e89d6 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -680,28 +680,20 @@ static int mthca_resize_cq(struct ib_cq *ibcq, unsigned int entries,
 	if (entries > dev->limits.max_cqes)
 		return -EINVAL;
 
-	mutex_lock(&cq->mutex);
-
 	entries = roundup_pow_of_two(entries + 1);
-	if (entries == ibcq->cqe + 1) {
-		ret = 0;
-		goto out;
-	}
+	if (entries == ibcq->cqe + 1)
+		return 0;
 
-	if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
-		ret = -EFAULT;
-		goto out;
-	}
+	if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
+		return -EFAULT;
 	lkey = ucmd.lkey;
 
 	ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries));
 	if (ret)
-		goto out;
+		return ret;
 
 	ibcq->cqe = entries - 1;
-out:
-	mutex_unlock(&cq->mutex);
-	return ret;
+	return 0;
 }
 
 static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.h b/drivers/infiniband/hw/mthca/mthca_provider.h
index 8a77483bb33c..7797d76fb93d 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.h
+++ b/drivers/infiniband/hw/mthca/mthca_provider.h
@@ -198,7 +198,6 @@ struct mthca_cq {
 	int			arm_sn;
 
 	wait_queue_head_t	wait;
-	struct mutex		mutex;
 };
 
 struct mthca_srq {

-- 
2.52.0