linux-kernel - Re: [RFC PATCH 17/33] irqchip/gic-v3-its: Add VLPI configuration hook

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Date:   Mon, 19 Jun 2017 15:52:57 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     shankerd@...eaurora.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>
Subject: Re: [RFC PATCH 17/33] irqchip/gic-v3-its: Add VLPI configuration hook

On 13/02/17 23:07, Shanker Donthineni wrote:
> 
> 
> On 01/17/2017 04:20 AM, Marc Zyngier wrote:
>> Add the skeleton irq_set_vcpu_affinity method that will be used
>> to configure VLPIs.
>>
>> Signed-off-by: Marc Zyngier <marc.zyngier@....com>
>> ---
>>   drivers/irqchip/irq-gic-v3-its.c | 33 +++++++++++++++++++++++++++++++++
>>   1 file changed, 33 insertions(+)
>>
>> diff --git a/drivers/irqchip/irq-gic-v3-its.c
>> b/drivers/irqchip/irq-gic-v3-its.c
>> index 0dbc8b0..1bd78ca 100644
>> --- a/drivers/irqchip/irq-gic-v3-its.c
>> +++ b/drivers/irqchip/irq-gic-v3-its.c
>> @@ -36,6 +36,7 @@
>>   
>>   #include <linux/irqchip.h>
>>   #include <linux/irqchip/arm-gic-v3.h>
>> +#include <linux/irqchip/arm-gic-v4.h>
>>   
>>   #include <asm/cputype.h>
>>   #include <asm/exception.h>
>> @@ -771,6 +772,37 @@ static int its_irq_set_irqchip_state(struct irq_data
>> *d,
>>   	return 0;
>>   }
>>   
>> +static int its_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info)
>> +{
>> +	struct its_device *its_dev = irq_data_get_irq_chip_data(d);
>> +	struct its_cmd_info *info = vcpu_info;
>> +	u32 event = its_get_event_id(d);
>> +
>> +	/* Need a v4 ITS */
>> +	if (!its_dev->its->is_v4 || !info)
>> +		return -EINVAL;
>> +
>> +	switch (info->cmd_type) {
>> +	case MAP_VLPI:
>> +	{
>> +		return 0;
>> +	}
>> +
>> +	case UNMAP_VLPI:
>> +	{
>> +		return 0;
>> +	}
>> +
>> +	case PROP_UPDATE_VLPI:
>> +	{
>> +		return 0;
>> +	}
>> +
>> +	default:
>> +		return -EINVAL;
>> +	}
> Missing a return statement.

What's wrong with this default: statement?

	M.
-- 
Jazz is not dead. It just smells funny...