Re: [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

On 05/16/2017 03:58 AM, Amarnath Valluri wrote:
> TPMDriverOps inside TPMBackend is not required, as it is supposed to be a class
> member. The only possible reason for keeping in TPMBackend was, to get the
> backend type in tpm.c where dedicated backend api, tpm_backend_get_type() is
> present.
>
> Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com>

Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>

> ---
>   hw/tpm/tpm_passthrough.c     | 4 ----
>   include/sysemu/tpm_backend.h | 1 -
>   tpm.c                        | 2 +-
>   3 files changed, 1 insertion(+), 6 deletions(-)
>
> diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c
> index 9234eb3..a0baf5f 100644
> --- a/hw/tpm/tpm_passthrough.c
> +++ b/hw/tpm/tpm_passthrough.c
> @@ -46,8 +46,6 @@
>   #define TPM_PASSTHROUGH(obj) \
>       OBJECT_CHECK(TPMPassthruState, (obj), TYPE_TPM_PASSTHROUGH)
>
> -static const TPMDriverOps tpm_passthrough_driver;
> -
>   /* data structures */
>   typedef struct TPMPassthruThreadParams {
>       TPMState *tpm_state;
> @@ -462,8 +460,6 @@ static TPMBackend *tpm_passthrough_create(QemuOpts *opts, const char *id)
>       /* let frontend set the fe_model to proper value */
>       tb->fe_model = -1;
>
> -    tb->ops = &tpm_passthrough_driver;
> -
>       if (tpm_passthrough_handle_device_opts(opts, tb)) {
>           goto err_exit;
>       }
> diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h
> index b58f52d..e7f590d 100644
> --- a/include/sysemu/tpm_backend.h
> +++ b/include/sysemu/tpm_backend.h
> @@ -50,7 +50,6 @@ struct TPMBackend {
>       enum TpmModel fe_model;
>       char *path;
>       char *cancel_path;
> -    const TPMDriverOps *ops;
>
>       QLIST_ENTRY(TPMBackend) list;
>   };
> diff --git a/tpm.c b/tpm.c
> index 9a7c711..0ee021a 100644
> --- a/tpm.c
> +++ b/tpm.c
> @@ -258,7 +258,7 @@ static TPMInfo *qmp_query_tpm_inst(TPMBackend *drv)
>       res->model = drv->fe_model;
>       res->options = g_new0(TpmTypeOptions, 1);
>
> -    switch (drv->ops->type) {
> +    switch (tpm_backend_get_type(drv)) {
>       case TPM_TYPE_PASSTHROUGH:
>           res->options->type = TPM_TYPE_OPTIONS_KIND_PASSTHROUGH;
>           tpo = g_new0(TPMPassthroughOptions, 1);