linux-kernel - Re: [PATCH v5] m68k: Replace setup_irq() by request

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Message-ID: <3c721380-2348-dccd-8de8-5ee60a1d5240@linux-m68k.org>
Date:   Wed, 4 Mar 2020 11:39:41 +1000
From:   Greg Ungerer <gerg@...ux-m68k.org>
To:     afzal mohammed <afzal.mohd.ma@...il.com>
Cc:     linux-m68k@...ts.linux-m68k.org, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Finn Thain <fthain@...egraphics.com.au>
Subject: Re: [PATCH v5] m68k: Replace setup_irq() by request_irq()

Hi Afzal,

On 4/3/20 11:37 am, afzal mohammed wrote:
> Hi Greg,
> 
> On Mon, Mar 02, 2020 at 11:32:53AM +1000, Greg Ungerer wrote:
> 
>> I have retested and everything works as expected, so:
>>
>>    Tested-by: Greg Ungerer <gerg@...ux-m68k.org>
>>
>> I have applied this to the m68knommu git tree, for next branch.
> 
> Thanks
> 
>>>    void hw_timer_init(irq_handler_t handler)
>>>    {
>>> +	int r;
>>
>> You used 'r' here as the error return value holder.
>> But in the previous cases you used 'ret'.
>> I would have used the same name everywhere ('ret' probably being the
>> most commonly used in the kernel).
> 
> That was a circus to dodge 80 char limit, i did think about it while
> making the changes whether to do or not. If 'ret' is used request_irq()
> line had to be split to two, slightly affecting the readability and
> since 'r' was a local variable (though conventionally 'ret' or 'err'
> is used) went ahead that way. Even if 're' is used as the local
> variable, it would be 81 chars ;)
> 
> Let me know if you want to change it.

Understand. No, no need to change it.

Regards
Greg


> Regards
> afzal
> 
>>> -	setup_irq(MCF_IRQ_TIMER, &mcfslt_timer_irq);
>>> +	r = request_irq(MCF_IRQ_TIMER, mcfslt_tick, IRQF_TIMER, "timer", NULL);
>>> +	if (r) {
>>> +		pr_err("Failed to request irq %d (timer): %pe\n", MCF_IRQ_TIMER,
>>> +		       ERR_PTR(r));
>>> +	}