Re: [PATCH 2/5] memory: renesas-rpc-if: Make rpcif_enable/disable_rpm() as static inline

[Geert Uytterhoeven]

Hi Prabhakar,

On Tue, Nov 24, 2020 at 12:27 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> wrote:
> Define rpcif_enable_rpm() and rpcif_disable_rpm() as static
> inline in the header instead of exporting it.
>
> Suggested-by: Pavel Machek <pavel@xxxxxxx>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>

Thanks for your patch, which is an improvement.

> --- a/include/memory/renesas-rpc-if.h
> +++ b/include/memory/renesas-rpc-if.h
> @@ -10,6 +10,7 @@
>  #ifndef __RENESAS_RPC_IF_H
>  #define __RENESAS_RPC_IF_H
>
> +#include <linux/pm_runtime.h>
>  #include <linux/types.h>
>
>  enum rpcif_data_dir {
> @@ -77,11 +78,19 @@ struct      rpcif {
>
>  int  rpcif_sw_init(struct rpcif *rpc, struct device *dev);
>  void rpcif_hw_init(struct rpcif *rpc, bool hyperflash);
> -void rpcif_enable_rpm(struct rpcif *rpc);
> -void rpcif_disable_rpm(struct rpcif *rpc);
>  void rpcif_prepare(struct rpcif *rpc, const struct rpcif_op *op, u64 *offs,
>                    size_t *len);
>  int rpcif_manual_xfer(struct rpcif *rpc);
>  ssize_t rpcif_dirmap_read(struct rpcif *rpc, u64 offs, size_t len, void *buf);
>
> +static inline void rpcif_enable_rpm(struct rpcif *rpc)
> +{
> +       pm_runtime_enable(rpc->dev);
> +}
> +
> +static inline void rpcif_disable_rpm(struct rpcif *rpc)
> +{
> +       pm_runtime_put_sync(rpc->dev);

Looking at how this is used, this should call pm_runtime_disable()
instead.

And probably this should be moved inside the core RPC-IF driver:
  1. pm_runtime_enable() could be called from rpcif_sw_init(),
  2. pm_runtime_put_sync() can be called from a new rpc_sw_deinit()
     function, to be called by the SPI and MTD drivers on probe failure
     and on remove.

> +}

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds