Re: [PATCH rdma-next 1/8] RDMA/core: Check if client supports IB device or not

[Gal Pressman]

On 05/04/2021 8:49, Leon Romanovsky wrote:
> From: Parav Pandit <parav@xxxxxxxxxx>
> 
> RDMA devices are of different transport(iWarp, IB, RoCE) and have
> different attributes.
> Not all clients are interested in all type of devices.
> 
> Implement a generic callback that each IB client can implement to decide
> if client add() or remove() should be done by the IB core or not for a
> given IB device, client combination.
> 
> Signed-off-by: Parav Pandit <parav@xxxxxxxxxx>
> Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
> ---
>  drivers/infiniband/core/device.c | 3 +++
>  include/rdma/ib_verbs.h          | 9 +++++++++
>  2 files changed, 12 insertions(+)
> 
> diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
> index c660cef66ac6..c9af2deba8c1 100644
> --- a/drivers/infiniband/core/device.c
> +++ b/drivers/infiniband/core/device.c
> @@ -691,6 +691,9 @@ static int add_client_context(struct ib_device *device,
>  	if (!device->kverbs_provider && !client->no_kverbs_req)
>  		return 0;
>  
> +	if (client->is_supported && !client->is_supported(device))
> +		return 0;

Isn't it better to remove the kverbs_provider flag (from previous if statement)
and unify it with this generic support check?