RDMA/hns: Bugfix for mapping user db
[ Upstream commit 2557fabd6e29f349bfa0ac13f38ac98aa5eafc74 ] When the maximum send wr delivered by the user is zero, the qp does not have a sq. When allocating the sq db buffer to store the user sq pi pointer and map it to the kernel mode, max_send_wr is used as the trigger condition, while the kernel does not consider the max_send_wr trigger condition when mapmping db. It will cause sq record doorbell map fail and create qp fail. The failed print information as follows: hns3 0000:7d:00.1: Send cmd: tail - 418, opcode - 0x8504, flag - 0x0011, retval - 0x0000 hns3 0000:7d:00.1: Send cmd: 0xe59dc000 0x00000000 0x00000000 0x00000000 0x00000116 0x0000ffff hns3 0000:7d:00.1: sq record doorbell map failed! hns3 0000:7d:00.1: Create RC QP failed Fixes: 0425e3e6 ("RDMA/hns: Support flush cqe for hip08 in kernel space") Signed-off-by: NLijun Ou <oulijun@huawei.com> Signed-off-by: NJason Gunthorpe <jgg@mellanox.com> Signed-off-by: NSasha Levin <sashal@kernel.org>
Showing
想要评论请 注册 或 登录