Change the locking to not disable interrupts as the lookup in
interrupt context will not see a freed CQ, thanks to the
synchronize_irq() call before freeing the CQ.
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
---
drivers/infiniband/hw/hns/hns_roce_cq.c | 33 +++++++--------------
drivers/infiniband/hw/hns/hns_roce_device.h | 3 +-
2 files changed, 12 insertions(+), 24 deletions(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_cq.c b/drivers/infiniband/hw/hns/hns_roce_cq.c
index 3a485f50fede..81f934930fec 100644
--- a/drivers/infiniband/hw/hns/hns_roce_cq.c
+++ b/drivers/infiniband/hw/hns/hns_roce_cq.c
@@ -127,13 +127,9 @@ static int hns_roce_cq_alloc(struct hns_roce_dev *hr_dev, int nent,
goto err_out;
}
- /* The cq insert radix tree */
- spin_lock_irq(&cq_table->lock);
- /* Radix_tree: The associated pointer and long integer key value like */
- ret = radix_tree_insert(&cq_table->tree, hr_cq->cqn, hr_cq);
- spin_unlock_irq(&cq_table->lock);
+ ret = xa_err(xa_store(&cq_table->array, hr_cq->cqn, hr_cq, GFP_KERNEL));
if (ret) {
- dev_err(dev, "CQ alloc.Failed to radix_tree_insert.\n");
+ dev_err(dev, "CQ alloc failed xa_store.\n");
goto err_put;
}
@@ -141,7 +137,7 @@ static int hns_roce_cq_alloc(struct hns_roce_dev *hr_dev, int nent,
mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
if (IS_ERR(mailbox)) {
ret = PTR_ERR(mailbox);
- goto err_radix;
+ goto err_xa;
}
hr_dev->hw->write_cqc(hr_dev, hr_cq, mailbox->buf, mtts, dma_handle,
@@ -152,7 +148,7 @@ static int hns_roce_cq_alloc(struct hns_roce_dev *hr_dev, int nent,
hns_roce_free_cmd_mailbox(hr_dev, mailbox);
if (ret) {
dev_err(dev, "CQ alloc.Failed to cmd mailbox.\n");
- goto err_radix;
+ goto err_xa;
}
hr_cq->cons_index = 0;
@@ -164,10 +160,8 @@ static int hns_roce_cq_alloc(struct hns_roce_dev *hr_dev, int nent,
return 0;
-err_radix:
- spin_lock_irq(&cq_table->lock);
- radix_tree_delete(&cq_table->tree, hr_cq->cqn);
- spin_unlock_irq(&cq_table->lock);
+err_xa:
+ xa_erase(&cq_table->array, hr_cq->cqn);
err_put:
hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn);
@@ -197,6 +191,8 @@ void hns_roce_free_cq(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
dev_err(dev, "HW2SW_CQ failed (%d) for CQN %06lx\n", ret,
hr_cq->cqn);
+ xa_erase(&cq_table->array, hr_cq->cqn);
+
/* Waiting interrupt process procedure carried out */
synchronize_irq(hr_dev->eq_table.eq[hr_cq->vector].irq);
@@ -205,10 +201,6 @@ void hns_roce_free_cq(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
complete(&hr_cq->free);
wait_for_completion(&hr_cq->free);
- spin_lock_irq(&cq_table->lock);
- radix_tree_delete(&cq_table->tree, hr_cq->cqn);
- spin_unlock_irq(&cq_table->lock);
-
hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn);
hns_roce_bitmap_free(&cq_table->bitmap, hr_cq->cqn, BITMAP_NO_RR);
}
@@ -490,8 +482,7 @@ void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn)
struct device *dev = hr_dev->dev;
struct hns_roce_cq *cq;
- cq = radix_tree_lookup(&hr_dev->cq_table.tree,
- cqn & (hr_dev->caps.num_cqs - 1));
+ cq = xa_load(&hr_dev->cq_table.array, cqn & (hr_dev->caps.num_cqs - 1));
if (!cq) {
dev_warn(dev, "Completion event for bogus CQ 0x%08x\n", cqn);
return;
@@ -508,8 +499,7 @@ void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type)
struct device *dev = hr_dev->dev;
struct hns_roce_cq *cq;
- cq = radix_tree_lookup(&cq_table->tree,
- cqn & (hr_dev->caps.num_cqs - 1));
+ cq = xa_load(&cq_table->array, cqn & (hr_dev->caps.num_cqs - 1));
if (cq)
atomic_inc(&cq->refcount);
@@ -529,8 +519,7 @@ int hns_roce_init_cq_table(struct hns_roce_dev *hr_dev)
{
struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
- spin_lock_init(&cq_table->lock);
- INIT_RADIX_TREE(&cq_table->tree, GFP_ATOMIC);
+ xa_init(&cq_table->array);
return hns_roce_bitmap_init(&cq_table->bitmap, hr_dev->caps.num_cqs,
hr_dev->caps.num_cqs - 1,
diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index 509e467843f6..4f63fe8869b2 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -486,8 +486,7 @@ struct hns_roce_qp_table {
struct hns_roce_cq_table {
struct hns_roce_bitmap bitmap;
- spinlock_t lock;
- struct radix_tree_root tree;
+ struct xarray array;
struct hns_roce_hem_table table;
};
--
2.20.1
