5.10-stable review patch. If anyone has any objections, please let me know.
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From: Chengchang Tang tangchengchang@huawei.com
commit b46494b6f9c19f141114a57729e198698f40af37 upstream.
xa_lock for SRQ table may be required in AEQ. Use xa_store_irq()/ xa_erase_irq() to avoid deadlock.
Fixes: 81fce6291d99 ("RDMA/hns: Add SRQ asynchronous event support") Signed-off-by: Chengchang Tang tangchengchang@huawei.com Signed-off-by: Junxian Huang huangjunxian6@hisilicon.com Link: https://lore.kernel.org/r/20240412091616.370789-5-huangjunxian6@hisilicon.co... Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/infiniband/hw/hns/hns_roce_main.c | 1 + drivers/infiniband/hw/hns/hns_roce_srq.c | 6 +++--- 2 files changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/infiniband/hw/hns/hns_roce_main.c +++ b/drivers/infiniband/hw/hns/hns_roce_main.c @@ -37,6 +37,7 @@ #include <rdma/ib_smi.h> #include <rdma/ib_user_verbs.h> #include <rdma/ib_cache.h> +#include "hnae3.h" #include "hns_roce_common.h" #include "hns_roce_device.h" #include <rdma/hns-abi.h> --- a/drivers/infiniband/hw/hns/hns_roce_srq.c +++ b/drivers/infiniband/hw/hns/hns_roce_srq.c @@ -120,7 +120,7 @@ static int alloc_srqc(struct hns_roce_de goto err_out; }
- ret = xa_err(xa_store(&srq_table->xa, srq->srqn, srq, GFP_KERNEL)); + ret = xa_err(xa_store_irq(&srq_table->xa, srq->srqn, srq, GFP_KERNEL)); if (ret) { ibdev_err(ibdev, "failed to store SRQC, ret = %d.\n", ret); goto err_put; @@ -149,7 +149,7 @@ static int alloc_srqc(struct hns_roce_de return ret;
err_xa: - xa_erase(&srq_table->xa, srq->srqn); + xa_erase_irq(&srq_table->xa, srq->srqn);
err_put: hns_roce_table_put(hr_dev, &srq_table->table, srq->srqn); @@ -169,7 +169,7 @@ static void free_srqc(struct hns_roce_de dev_err(hr_dev->dev, "DESTROY_SRQ failed (%d) for SRQN %06lx\n", ret, srq->srqn);
- xa_erase(&srq_table->xa, srq->srqn); + xa_erase_irq(&srq_table->xa, srq->srqn);
if (atomic_dec_and_test(&srq->refcount)) complete(&srq->free);