linux-kernel - Re: [PATCH 3/4] remoteproc: Split rproc_ops allocation from rproc

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Date:   Mon, 13 Apr 2020 15:56:40 -0500
From:   Alex Elder <elder@...aro.org>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        bjorn.andersson@...aro.org, ohad@...ery.com
Cc:     s-anna@...com, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] remoteproc: Split rproc_ops allocation from
 rproc_alloc()

On 4/13/20 2:34 PM, Mathieu Poirier wrote:
> Make the rproc_ops allocation a function on its own in order to
> introduce more flexibility to function rproc_alloc().
> 
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>

Looks good.

Reviewed-by: Alex Elder <elder@...aro.org>

> ---
>  drivers/remoteproc/remoteproc_core.c | 32 +++++++++++++++++-----------
>  1 file changed, 20 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index 4dee63f319ba..c272d78f07e8 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -2006,6 +2006,25 @@ static int rproc_alloc_firmware(struct rproc *rproc,
>  	return 0;
>  }
>  
> +static int rproc_alloc_ops(struct rproc *rproc, const struct rproc_ops *ops)
> +{
> +	rproc->ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL);
> +	if (!rproc->ops)
> +		return -ENOMEM;
> +
> +	/* Default to ELF loader if no load function is specified */
> +	if (!rproc->ops->load) {
> +		rproc->ops->load = rproc_elf_load_segments;
> +		rproc->ops->parse_fw = rproc_elf_load_rsc_table;
> +		rproc->ops->find_loaded_rsc_table =
> +						rproc_elf_find_loaded_rsc_table;
> +		rproc->ops->sanity_check = rproc_elf_sanity_check;

I'm glad you made this unconditional, the sanity check function
is always null when the load function is null.

> +		rproc->ops->get_boot_addr = rproc_elf_get_boot_addr;
> +	}
> +
> +	return 0;
> +}
> +
>  /**
>   * rproc_alloc() - allocate a remote processor handle
>   * @dev: the underlying device
> @@ -2045,8 +2064,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
>  	if (rproc_alloc_firmware(rproc, name, firmware))
>  		goto free_rproc;
>  
> -	rproc->ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL);
> -	if (!rproc->ops)
> +	if (rproc_alloc_ops(rproc, ops))
>  		goto free_firmware;
>  
>  	rproc->name = name;
> @@ -2073,16 +2091,6 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
>  
>  	atomic_set(&rproc->power, 0);
>  
> -	/* Default to ELF loader if no load function is specified */
> -	if (!rproc->ops->load) {
> -		rproc->ops->load = rproc_elf_load_segments;
> -		rproc->ops->parse_fw = rproc_elf_load_rsc_table;
> -		rproc->ops->find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table;
> -		if (!rproc->ops->sanity_check)
> -			rproc->ops->sanity_check = rproc_elf32_sanity_check;
> -		rproc->ops->get_boot_addr = rproc_elf_get_boot_addr;
> -	}
> -
>  	mutex_init(&rproc->lock);
>  
>  	INIT_LIST_HEAD(&rproc->carveouts);
>