On Sat, Mar 13, 2021 at 10:30:11AM +0800, Weihang Li wrote:
From: Lang Cheng <chenglang@huawei.com>
When reloading driver, the head/tail pointer of CMDQ may be not at position 0. Then during initialization of CMDQ, if head is reset first, the firmware will start to handle CMDQ because the head is not equal to the tail. The driver can reset tail first since the firmware will be triggerred only by head. This bug is introduced by changing macros of head/tail register without changing the order of initialization.
Fixes: 292b3352bd5b ("RDMA/hns: Adjust fields and variables about CMDQ tail/head") Signed-off-by: Lang Cheng <chenglang@huawei.com> Signed-off-by: Weihang Li <liweihang@huawei.com> --- Changes since v1: - Only retain the bugfix part for -rc branch. - Link: https://patchwork.kernel.org/project/linux-rdma/patch/1615541933-35798-1-git...
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
Applied to for-rc, thanks Jason