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path: root/drivers/infiniband/hw/mthca/mthca_cq.c
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Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_cq.c')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_cq.c41
1 files changed, 21 insertions, 20 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c b/drivers/infiniband/hw/mthca/mthca_cq.c
index 312cf90731e..205854e9c66 100644
--- a/drivers/infiniband/hw/mthca/mthca_cq.c
+++ b/drivers/infiniband/hw/mthca/mthca_cq.c
@@ -238,9 +238,9 @@ void mthca_cq_event(struct mthca_dev *dev, u32 cqn,
spin_lock(&dev->cq_table.lock);
cq = mthca_array_get(&dev->cq_table.cq, cqn & (dev->limits.num_cqs - 1));
-
if (cq)
- atomic_inc(&cq->refcount);
+ ++cq->refcount;
+
spin_unlock(&dev->cq_table.lock);
if (!cq) {
@@ -254,8 +254,10 @@ void mthca_cq_event(struct mthca_dev *dev, u32 cqn,
if (cq->ibcq.event_handler)
cq->ibcq.event_handler(&event, cq->ibcq.cq_context);
- if (atomic_dec_and_test(&cq->refcount))
+ spin_lock(&dev->cq_table.lock);
+ if (!--cq->refcount)
wake_up(&cq->wait);
+ spin_unlock(&dev->cq_table.lock);
}
static inline int is_recv_cqe(struct mthca_cqe *cqe)
@@ -267,23 +269,13 @@ static inline int is_recv_cqe(struct mthca_cqe *cqe)
return !(cqe->is_send & 0x80);
}
-void mthca_cq_clean(struct mthca_dev *dev, u32 cqn, u32 qpn,
+void mthca_cq_clean(struct mthca_dev *dev, struct mthca_cq *cq, u32 qpn,
struct mthca_srq *srq)
{
- struct mthca_cq *cq;
struct mthca_cqe *cqe;
u32 prod_index;
int nfreed = 0;
- spin_lock_irq(&dev->cq_table.lock);
- cq = mthca_array_get(&dev->cq_table.cq, cqn & (dev->limits.num_cqs - 1));
- if (cq)
- atomic_inc(&cq->refcount);
- spin_unlock_irq(&dev->cq_table.lock);
-
- if (!cq)
- return;
-
spin_lock_irq(&cq->lock);
/*
@@ -301,7 +293,7 @@ void mthca_cq_clean(struct mthca_dev *dev, u32 cqn, u32 qpn,
if (0)
mthca_dbg(dev, "Cleaning QPN %06x from CQN %06x; ci %d, pi %d\n",
- qpn, cqn, cq->cons_index, prod_index);
+ qpn, cq->cqn, cq->cons_index, prod_index);
/*
* Now sweep backwards through the CQ, removing CQ entries
@@ -325,8 +317,6 @@ void mthca_cq_clean(struct mthca_dev *dev, u32 cqn, u32 qpn,
}
spin_unlock_irq(&cq->lock);
- if (atomic_dec_and_test(&cq->refcount))
- wake_up(&cq->wait);
}
void mthca_cq_resize_copy_cqes(struct mthca_cq *cq)
@@ -821,7 +811,7 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
}
spin_lock_init(&cq->lock);
- atomic_set(&cq->refcount, 1);
+ cq->refcount = 1;
init_waitqueue_head(&cq->wait);
memset(cq_context, 0, sizeof *cq_context);
@@ -896,6 +886,17 @@ err_out:
return err;
}
+static inline int get_cq_refcount(struct mthca_dev *dev, struct mthca_cq *cq)
+{
+ int c;
+
+ spin_lock_irq(&dev->cq_table.lock);
+ c = cq->refcount;
+ spin_unlock_irq(&dev->cq_table.lock);
+
+ return c;
+}
+
void mthca_free_cq(struct mthca_dev *dev,
struct mthca_cq *cq)
{
@@ -929,6 +930,7 @@ void mthca_free_cq(struct mthca_dev *dev,
spin_lock_irq(&dev->cq_table.lock);
mthca_array_clear(&dev->cq_table.cq,
cq->cqn & (dev->limits.num_cqs - 1));
+ --cq->refcount;
spin_unlock_irq(&dev->cq_table.lock);
if (dev->mthca_flags & MTHCA_FLAG_MSI_X)
@@ -936,8 +938,7 @@ void mthca_free_cq(struct mthca_dev *dev,
else
synchronize_irq(dev->pdev->irq);
- atomic_dec(&cq->refcount);
- wait_event(cq->wait, !atomic_read(&cq->refcount));
+ wait_event(cq->wait, !get_cq_refcount(dev, cq));
if (cq->is_kernel) {
mthca_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);