linux-kernel - Re: [PATCH 1/7] fpga: wrap the write

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Message-ID: <YL6fUSD0KLP0l80g@epycbox.lan>
Date:   Mon, 7 Jun 2021 15:36:01 -0700
From:   Moritz Fischer <mdf@...nel.org>
To:     trix@...hat.com
Cc:     hao.wu@...el.com, mdf@...nel.org, michal.simek@...inx.com,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/7] fpga: wrap the write_init() op

On Mon, Jun 07, 2021 at 10:23:56AM -0700, trix@...hat.com wrote:
> From: Tom Rix <trix@...hat.com>
> 
> The board should not be required to provide a
Nit: Can you turn these into for whole series:
A FPGA Manager should not be ...

> write_init() op if there is nothing for it do.
> So add a wrapper and move the op checking.
> Default to success.
> 
> Signed-off-by: Tom Rix <trix@...hat.com>
> ---
>  drivers/fpga/fpga-mgr.c | 14 +++++++++++---
>  1 file changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
> index b85bc47c91a9..24547e36a56d 100644
> --- a/drivers/fpga/fpga-mgr.c
> +++ b/drivers/fpga/fpga-mgr.c
> @@ -69,6 +69,14 @@ void fpga_image_info_free(struct fpga_image_info *info)
>  }
>  EXPORT_SYMBOL_GPL(fpga_image_info_free);
>  
> +static int fpga_mgr_write_init(struct fpga_manager *mgr,
> +			       struct fpga_image_info *info,
> +			       const char *buf, size_t count)
> +{
> +	if (mgr->mops && mgr->mops->write_init)
> +		return  mgr->mops->write_init(mgr, info, buf, count);
> +	return 0;
> +}
>  /*
>   * Call the low level driver's write_init function.  This will do the
>   * device-specific things to get the FPGA into the state where it is ready to
> @@ -83,9 +91,9 @@ static int fpga_mgr_write_init_buf(struct fpga_manager *mgr,
>  
>  	mgr->state = FPGA_MGR_STATE_WRITE_INIT;
>  	if (!mgr->mops->initial_header_size)
> -		ret = mgr->mops->write_init(mgr, info, NULL, 0);
> +		ret = fpga_mgr_write_init(mgr, info, NULL, 0);
>  	else
> -		ret = mgr->mops->write_init(
> +		ret = fpga_mgr_write_init(
>  		    mgr, info, buf, min(mgr->mops->initial_header_size, count));
>  
>  	if (ret) {
> @@ -569,7 +577,7 @@ struct fpga_manager *fpga_mgr_create(struct device *dev, const char *name,
>  	int id, ret;
>  
>  	if (!mops || !mops->write_complete || !mops->state ||
> -	    !mops->write_init || (!mops->write && !mops->write_sg) ||
> +	    (!mops->write && !mops->write_sg) ||
>  	    (mops->write && mops->write_sg)) {
>  		dev_err(dev, "Attempt to register without fpga_manager_ops\n");
>  		return NULL;
> -- 
> 2.26.3
> 

Can you change the subjects to "fpga: fpga-mgr: ..."

Otherwise series looks good.

- Moritz