linux-kernel - Re: [PATCH] fpga: xilinx-pr-decoupler: remove useless function

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Message-ID: <40a0449f-37c4-6b3a-5a34-d865db971f9f@redhat.com>
Date:   Tue, 13 Apr 2021 07:41:35 -0700
From:   Tom Rix <trix@...hat.com>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>, mdf@...nel.org
Cc:     michal.simek@...inx.com, linux-fpga@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fpga: xilinx-pr-decoupler: remove useless function


On 4/12/21 8:51 PM, Jiapeng Chong wrote:
> Fix the following gcc warning:
>
> drivers/fpga/xilinx-pr-decoupler.c:32:19: warning: unused function
> 'xlnx_pr_decouple_read' [-Wunused-function].
>
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
> ---
>   drivers/fpga/xilinx-pr-decoupler.c | 6 ------
>   1 file changed, 6 deletions(-)
>
> diff --git a/drivers/fpga/xilinx-pr-decoupler.c b/drivers/fpga/xilinx-pr-decoupler.c
> index 7d69af2..f407cb2 100644
> --- a/drivers/fpga/xilinx-pr-decoupler.c
> +++ b/drivers/fpga/xilinx-pr-decoupler.c
> @@ -29,12 +29,6 @@ static inline void xlnx_pr_decoupler_write(struct xlnx_pr_decoupler_data *d,
>   	writel(val, d->io_base + offset);
>   }
>   
> -static inline u32 xlnx_pr_decouple_read(const struct xlnx_pr_decoupler_data *d,
> -					u32 offset)
> -{
> -	return readl(d->io_base + offset);
> -}
> -

I am not in favor of removing this function.

It should have been used in xlnx_pr_decoupler_enable_show() instead of 
the bare readl().

So use it in this function, and for consistency rename to 
xlnx_pr_decoupler_read()

that is 'decouple' -> 'decoupler'

Tom

>   static int xlnx_pr_decoupler_enable_set(struct fpga_bridge *bridge, bool enable)
>   {
>   	int err;