linux-kernel - Re: [PATCH] staging: qlge: qlge_main.c: convert do-while loops to for loops

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Date:   Thu, 9 Jun 2022 18:26:53 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Srivathsan Sivakumar <sri.skumar05@...il.com>
Cc:     Manish Chopra <manishc@...vell.com>, GR-Linux-NIC-Dev@...vell.com,
        Coiby Xu <coiby.xu@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        netdev@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: qlge: qlge_main.c: convert do-while loops to
 for loops

On Thu, Jun 09, 2022 at 11:15:51AM -0400, Srivathsan Sivakumar wrote:
> diff --git a/drivers/staging/qlge/qlge_main.c b/drivers/staging/qlge/qlge_main.c
> index 8c35d4c4b851..308e8b621185 100644
> --- a/drivers/staging/qlge/qlge_main.c
> +++ b/drivers/staging/qlge/qlge_main.c
> @@ -3006,13 +3006,13 @@ static int qlge_start_rx_ring(struct qlge_adapter *qdev, struct rx_ring *rx_ring
>  		cqicb->flags |= FLAGS_LL;	/* Load lbq values */
>  		tmp = (u64)rx_ring->lbq.base_dma;
>  		base_indirect_ptr = rx_ring->lbq.base_indirect;
> -		page_entries = 0;
> -		do {
> -			*base_indirect_ptr = cpu_to_le64(tmp);
> -			tmp += DB_PAGE_SIZE;
> -			base_indirect_ptr++;
> -			page_entries++;
> -		} while (page_entries < MAX_DB_PAGES_PER_BQ(QLGE_BQ_LEN));
> +
> +		for (page_entries = 0; page_entries <
> +			MAX_DB_PAGES_PER_BQ(QLGE_BQ_LEN); page_entries++) {
> +				*base_indirect_ptr = cpu_to_le64(tmp);
> +				tmp += DB_PAGE_SIZE;
> +				base_indirect_ptr++;
> +		}

It's better than the original, but wouldn't it be better yet to write
something like this (untested):

		for (i = 0; i <	MAX_DB_PAGES_PER_BQ(QLGE_BQ_LEN); i++)
			base_indirect_ptr[i] = cpu_to_le64(tmp + (i * DB_PAGE_SIZE));

Same with the other as well, obviously.

regards,
dan carpenter