On Sat, Mar 13, 2021 at 10:30:11AM +0800, Weihang Li wrote:
> From: Lang Cheng <chenglang@xxxxxxxxxx>
>
> 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@xxxxxxxxxx>
> Signed-off-by: Weihang Li <liweihang@xxxxxxxxxx>
> ---
> Changes since v1:
> - Only retain the bugfix part for -rc branch.
> - Link: https://patchwork.kernel.org/project/linux-rdma/patch/1615541933-35798-1-git-send-email-liweihang@xxxxxxxxxx/
>
> drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
Applied to for-rc, thanks
Jason
