linux-kernel - Re: [RFC 13/19] staging: qlge: rewrite do while loop as for loop in qlge_sem

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Date:   Thu, 24 Jun 2021 19:22:45 +0800
From:   Coiby Xu <coiby.xu@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     linux-staging@...ts.linux.dev, netdev@...r.kernel.org,
        Benjamin Poirier <benjamin.poirier@...il.com>,
        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 13/19] staging: qlge: rewrite do while loop as for loop in
 qlge_sem_spinlock

On Tue, Jun 22, 2021 at 10:20:36AM +0300, Dan Carpenter wrote:
>On Mon, Jun 21, 2021 at 09:48:56PM +0800, Coiby Xu wrote:
>> Since wait_count=30 > 0, the for loop is equivalent to do while
>> loop. This commit also replaces 100 with UDELAY_DELAY.
>>
>> Signed-off-by: Coiby Xu <coiby.xu@...il.com>
>> ---
>>  drivers/staging/qlge/qlge_main.c | 7 ++++---
>>  1 file changed, 4 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/staging/qlge/qlge_main.c b/drivers/staging/qlge/qlge_main.c
>> index c5e161595b1f..2d2405be38f5 100644
>> --- a/drivers/staging/qlge/qlge_main.c
>> +++ b/drivers/staging/qlge/qlge_main.c
>> @@ -140,12 +140,13 @@ static int qlge_sem_trylock(struct qlge_adapter *qdev, u32 sem_mask)
>>  int qlge_sem_spinlock(struct qlge_adapter *qdev, u32 sem_mask)
>>  {
>>  	unsigned int wait_count = 30;
>> +	int count;
>>
>> -	do {
>> +	for (count = 0; count < wait_count; count++) {
>>  		if (!qlge_sem_trylock(qdev, sem_mask))
>>  			return 0;
>> -		udelay(100);
>> -	} while (--wait_count);
>> +		udelay(UDELAY_DELAY);
>
>This is an interesting way to silence the checkpatch udelay warning.  ;)

I didn't know this could silence the warning :)

>
>regards,
>dan carpenter
>

-- 
Best regards,
Coiby