On Tue, Apr 23, 2019 at 05:30:26PM +0800, Lijun Ou wrote:
> when the maximum send wr delivered by the user is zero,
> qp does not have 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:
> ...
> ...
> [100271.504204] hns3 0000:7d:00.1: Send cmd: tail - 418, opcode - 0x8504, flag - 0x0011, retval - 0x0000
> [100271.514826] hns3 0000:7d:00.1: Send cmd: 0xe59dc000 0x00000000 0x00000000 0x00000000 0x00000116 0x0000ffff
> [100271.619589] hns3 0000:7d:00.1: sq record doorbell map failed!
> [100271.628559] hns3 0000:7d:00.1: Create RC QP failed
>
> Fixes: 0425e3e6e0c7 ("RDMA/hns: Support flush cqe for hip08 in kernel space")
> Signed-off-by: Lijun Ou <oulijun@xxxxxxxxxx>
> ---
> V2->V3:
> 1. Add a paragraph to describe what bad result it will have.
>
> V1->V2:
> 1. Split it from the patchset("[PATCH for-rc 0/8] Some hns bugfixes for 5.0-rc3")
> 2. Add necessary note for fixing: line
> ---
> drivers/infiniband/hw/hns/hns_roce_qp.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Applied to for-rc thanks
Jason
