Re: [PATCH for-next] RDMA/irdma: Add SW mechanism to generate completions on error

[Jason Gunthorpe <jgg@nvidia.com>]

On Mon, Apr 25, 2022 at 01:16:24PM -0500, Shiraz Saleem wrote:
> From: Mustafa Ismail <mustafa.ismail@intel.com>
> 
> HW flushes after QP in error state is not reliable. This can lead to
> application hang waiting on a completion for outstanding WRs.
> Implement a SW mechanism to generate completions for any
> outstanding WR's after the QP is modified to error.
> 
> This is accomplished by starting a delayed worker after the QP is
> modified to error and the HW flush is performed. The worker
> will generate completions that will be returned to the application
> when it polls the CQ. This mechanism only applies to Kernel
> applications.
> 
> Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
> Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
> ---
>  drivers/infiniband/hw/irdma/hw.c    |  31 ++++----
>  drivers/infiniband/hw/irdma/utils.c | 147 ++++++++++++++++++++++++++++++++++++
>  drivers/infiniband/hw/irdma/verbs.c |  56 ++++++++------
>  drivers/infiniband/hw/irdma/verbs.h |  13 +++-
>  4 files changed, 210 insertions(+), 37 deletions(-)

Applied to for-next, thanks

Jason