linux-kernel - Re: [PATCH v2 6/7] remoteproc: Split rproc_ops allocation from rproc

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Date:   Fri, 17 Apr 2020 08:49:25 -0500
From:   Suman Anna <s-anna@...com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        <bjorn.andersson@...aro.org>, <ohad@...ery.com>
CC:     <elder@...aro.org>, <Markus.Elfring@....de>,
        <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 6/7] remoteproc: Split rproc_ops allocation from
 rproc_alloc()

On 4/15/20 3:48 PM, Mathieu Poirier wrote:
> Make the rproc_ops allocation a function on its own in an effort
> to clean up function rproc_alloc().
> 
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
> 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 0bfa6998705d..a5a0ceb86b3f 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -2001,6 +2001,25 @@ 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;

So, the conditional check on sanity check is dropped and the callback 
switched here without the changelog reflecting anything why. You should 
just rebase this patch on top of Clement's patch [1] that removes the 
conditional flag, and also usage from the remoteproc platform drivers.

regards
Suman

[1] https://patchwork.kernel.org/patch/11462013/


> +		rproc->ops->get_boot_addr = rproc_elf_get_boot_addr;
> +	}
> +
> +	return 0;
> +}
> +
>   /**
>    * rproc_alloc() - allocate a remote processor handle
>    * @dev: the underlying device
> @@ -2040,8 +2059,7 @@ 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;
> @@ -2068,16 +2086,6 @@ 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);
>