linux-kernel - Re: [RFC 12/19] staging: qlge: rewrite do while loops as for loops in qlge_start_rx

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Message-ID: <20210624115644.dmjskfsbcu7xcat5@Rk>
Date:   Thu, 24 Jun 2021 19:56:44 +0800
From:   Coiby Xu <coiby.xu@...il.com>
To:     Benjamin Poirier <benjamin.poirier@...il.com>
Cc:     linux-staging@...ts.linux.dev, netdev@...r.kernel.org,
        Shung-Hsi Yu <shung-hsi.yu@...e.com>,
        Manish Chopra <manishc@...vell.com>,
        "supporter:QLOGIC QLGE 10Gb ETHERNET DRIVER" 
        <GR-Linux-NIC-Dev@...vell.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 12/19] staging: qlge: rewrite do while loops as for loops
 in qlge_start_rx_ring

On Tue, Jun 22, 2021 at 04:45:22PM +0900, Benjamin Poirier wrote:
>On 2021-06-21 21:48 +0800, Coiby Xu wrote:
>> Since MAX_DB_PAGES_PER_BQ > 0, the for loop is equivalent to do while
>> loop.
>>
>> Signed-off-by: Coiby Xu <coiby.xu@...il.com>
>> ---
>>  drivers/staging/qlge/qlge_main.c | 10 ++++------
>>  1 file changed, 4 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/staging/qlge/qlge_main.c b/drivers/staging/qlge/qlge_main.c
>> index 7aee9e904097..c5e161595b1f 100644
>> --- a/drivers/staging/qlge/qlge_main.c
>> +++ b/drivers/staging/qlge/qlge_main.c
>> @@ -3029,12 +3029,11 @@ static int qlge_start_cq(struct qlge_adapter *qdev, struct qlge_cq *cq)
>>  		tmp = (u64)rx_ring->lbq.base_dma;
>>  		base_indirect_ptr = rx_ring->lbq.base_indirect;
>>  		page_entries = 0;
>
>This initialization can be removed now. Same thing below.

Yes, thanks for the suggestion!

>
>> -		do {
>> +		for (page_entries = 0; page_entries < MAX_DB_PAGES_PER_BQ; page_entries++) {
>>  			*base_indirect_ptr = cpu_to_le64(tmp);
>>  			tmp += DB_PAGE_SIZE;
>>  			base_indirect_ptr++;
>> -			page_entries++;
>> -		} while (page_entries < MAX_DB_PAGES_PER_BQ);
>> +		}
>>  		cqicb->lbq_addr = cpu_to_le64(rx_ring->lbq.base_indirect_dma);
>>  		cqicb->lbq_buf_size =
>>  			cpu_to_le16(QLGE_FIT16(qdev->lbq_buf_size));
>> @@ -3046,12 +3045,11 @@ static int qlge_start_cq(struct qlge_adapter *qdev, struct qlge_cq *cq)
>>  		tmp = (u64)rx_ring->sbq.base_dma;
>>  		base_indirect_ptr = rx_ring->sbq.base_indirect;
>>  		page_entries = 0;
>> -		do {
>> +		for (page_entries = 0; page_entries < MAX_DB_PAGES_PER_BQ; page_entries++) {
>>  			*base_indirect_ptr = cpu_to_le64(tmp);
>>  			tmp += DB_PAGE_SIZE;
>>  			base_indirect_ptr++;
>> -			page_entries++;
>> -		} while (page_entries < MAX_DB_PAGES_PER_BQ);
>> +		}
>>  		cqicb->sbq_addr = cpu_to_le64(rx_ring->sbq.base_indirect_dma);
>>  		cqicb->sbq_buf_size = cpu_to_le16(QLGE_SMALL_BUFFER_SIZE);
>>  		cqicb->sbq_len = cpu_to_le16(QLGE_FIT16(QLGE_BQ_LEN));
>> --
>> 2.32.0
>>

-- 
Best regards,
Coiby