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Subject: Re: [PATCH] mmc: queue: Remove unused parameters(request_queue)
To:     Chanwoo Lee <cw9316.lee@samsung.com>, ulf.hansson@linaro.org,
        colyli@suse.de, axboe@kernel.dk, ebiggers@google.com,
        pcc@google.com, porzio@gmail.com, linux-mmc@vger.kernel.org,
        linux-kernel@vger.kernel.org
Cc:     grant.jung@samsung.com, jt77.jang@samsung.com,
        dh0421.hwang@samsung.com, sh043.lee@samsung.com
References: <CGME20210825004043epcas1p33ca4a682a765e1270258bba083fe66d6@epcas1p3.samsung.com>
 <20210825003318.31574-1-cw9316.lee@samsung.com>
From:   Adrian Hunter <adrian.hunter@intel.com>
Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki,
 Business Identity Code: 0357606 - 4, Domiciled in Helsinki
Message-ID: <2e292b9c-9b1e-dc3e-45f9-06beb31d79b6@intel.com>
Date:   Wed, 25 Aug 2021 07:46:23 +0300
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On 25/08/21 3:33 am, Chanwoo Lee wrote:
> From: ChanWoo Lee <cw9316.lee@samsung.com>
> 
> In function mmc_exit_request, the request_queue structure(*q) is not used.
> I remove the unnecessary code related to the request_queue structure.
> 
> Signed-off-by: ChanWoo Lee <cw9316.lee@samsung.com>
> ---
>  drivers/mmc/core/queue.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
> index cc3261777637..b742385361e4 100644
> --- a/drivers/mmc/core/queue.c
> +++ b/drivers/mmc/core/queue.c
> @@ -219,7 +219,7 @@ static int __mmc_init_request(struct mmc_queue *mq, struct request *req,
>  	return 0;
>  }
>  
> -static void mmc_exit_request(struct request_queue *q, struct request *req)
> +static void mmc_exit_request(struct request *req)
>  {
>  	struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req);
>  
> @@ -236,9 +236,7 @@ static int mmc_mq_init_request(struct blk_mq_tag_set *set, struct request *req,
>  static void mmc_mq_exit_request(struct blk_mq_tag_set *set, struct request *req,
>  				unsigned int hctx_idx)
>  {
> -	struct mmc_queue *mq = set->driver_data;
> -
> -	mmc_exit_request(mq->queue, req);
> +	mmc_exit_request(req);

It seems this is the only caller of mmc_exit_request().  It is probably
leftover from before the switch to blk-mq.  However we might as well get rid
of it and just put the code directly into mmc_mq_exit_request().

The same applies to mmc_mq_init_request() and __mmc_init_request(), so might
as well tidy up those also.

>  }
>  
>  static blk_status_t mmc_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
>