linux-kernel - Re: [PATCH] mmc: queue: Match the data type of max

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Date:   Tue, 24 Aug 2021 18:26:30 +0800
From:   Coly Li <colyli@...e.de>
To:     Chanwoo Lee <cw9316.lee@...sung.com>
Cc:     grant.jung@...sung.com, jt77.jang@...sung.com,
        dh0421.hwang@...sung.com, sh043.lee@...sung.com,
        adrian.hunter@...el.com, axboe@...nel.dk, ebiggers@...gle.com,
        pcc@...gle.com, porzio@...il.com, ulf.hansson@...aro.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mmc: queue: Match the data type of max_segments

On 8/24/21 3:39 PM, Chanwoo Lee wrote:
> From: ChanWoo Lee <cw9316.lee@...sung.com>
>
> Each function has a different data type for max_segments,
> Modify to match unsigned short(host->max_segs).
> * unsigned short          max_segs;       /* see blk_queue_max_segments */
>
> 1) Return type : unsigned int
> static unsigned int mmc_get_max_segments(struct mmc_host *host)
> {
>        return host->can_dma_map_merge ? MMC_DMA_MAP_MERGE_SEGMENTS :
>                                          host->max_segs;
> }
>
> 2) Parameter type : int
>  mmc_alloc_sg(mmc_get_max_segments(host), gfp);
>    -> static struct scatterlist *mmc_alloc_sg(int sg_len, gfp_t gfp)
>
> 3) Parameter type : unsigned short
>  blk_queue_max_segments(mq->queue, mmc_get_max_segments(host));
>    -> void blk_queue_max_segments(struct request_queue *q,
>                                         unsigned short max_segments)
>
> Signed-off-by: ChanWoo Lee <cw9316.lee@...sung.com>

I am not sure whether it is mandatory necessary here, but it is OK for me.

Acked-by: Coly Li <colyli@...e.de>

Thanks.

Coly Li

> ---
>  drivers/mmc/core/queue.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
> index cc3261777637..48304bcf963c 100644
> --- a/drivers/mmc/core/queue.c
> +++ b/drivers/mmc/core/queue.c
> @@ -163,7 +163,7 @@ static void mmc_mq_recovery_handler(struct work_struct *work)
>  	blk_mq_run_hw_queues(q, true);
>  }
>  
> -static struct scatterlist *mmc_alloc_sg(int sg_len, gfp_t gfp)
> +static struct scatterlist *mmc_alloc_sg(unsigned short sg_len, gfp_t gfp)
>  {
>  	struct scatterlist *sg;
>  
> @@ -193,7 +193,7 @@ static void mmc_queue_setup_discard(struct request_queue *q,
>  		blk_queue_flag_set(QUEUE_FLAG_SECERASE, q);
>  }
>  
> -static unsigned int mmc_get_max_segments(struct mmc_host *host)
> +static unsigned short mmc_get_max_segments(struct mmc_host *host)
>  {
>  	return host->can_dma_map_merge ? MMC_DMA_MAP_MERGE_SEGMENTS :
>  					 host->max_segs;