linux-kernel - Re: [PATCH] irqchip: mxs: add missing set_handle

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Message-ID: <56AB29C4.8060304@rempel-privat.de>
Date:	Fri, 29 Jan 2016 09:58:44 +0100
From:	Oleksij Rempel <linux@...pel-privat.de>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	kernel@...gutronix.de, linux-kernel@...r.kernel.org,
	jason@...edaemon.net, marc.zyngier@....com
Subject: Re: [PATCH] irqchip: mxs: add missing set_handle_irq()

Am 29.01.2016 um 09:54 schrieb Thomas Gleixner:
> On Fri, 29 Jan 2016, Oleksij Rempel wrote:
>> Am 29.01.2016 um 09:33 schrieb Thomas Gleixner:
>>> On Fri, 29 Jan 2016, Oleksij Rempel wrote:
>>>
>>>> this will fix IRQ related issues on Alphascale ASM9260
>>>
>>> This really does not qualify as a changelog.
>>>
>>> 1) What's the problem and what consequences does it have
>>>
>>> 2) What's the fix.
>>>
>>> Thanks,
>>>
>>> 	tglx
>>>
>>
>> The driver provide this function:
>> asmlinkage void __exception_irq_entry icoll_handle_irq(struct pt_regs *regs)
>> {
>>         u32 irqnr;
>>
>>         irqnr = __raw_readl(icoll_priv.stat);
>>         __raw_writel(irqnr, icoll_priv.vector);
>>         handle_domain_irq(icoll_domain, irqnr, regs);
>> }
>>
>> i assume at some late review point instead of move it to asm9260_of_init
>> i removed it completely. As result, the driver was compilable but not
>> working.
>> Should i put this explanation to changelog?
> 
> So the problem is:
> 
> The rework of the driver missed to move the call to set_handle_irq() into
> asm9260_of_init(). As a consequence no interrupt entry point is installed and
> no interrupts are delivered (or whatever the outcome is, crash, explode ...)
> 
> Solution is:
> 
> Install the interrupt entry handler.
> 
> Right?

Right.

Should i resend a patch with new comment?

> And that wants a tag:
> 
> Fixes: nnnnnnnnnnnn ("irqchip/......")
> 
> So we can mark it for stable.
> 
> Thanks,
> 
> 	tglx
> 


-- 
Regards,
Oleksij


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