linux-kernel - Re: [PATCH v3 2/7] vfio: platform: add capability to register a reset function

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Date:	Fri, 23 Oct 2015 16:15:06 +0200
From:	Eric Auger <eric.auger@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>, linux-arm-kernel@...ts.infradead.org
Cc:	eric.auger@...com, alex.williamson@...hat.com,
	b.reynal@...tualopensystems.com, kvmarm@...ts.cs.columbia.edu,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	christoffer.dall@...aro.org, patches@...aro.org
Subject: Re: [PATCH v3 2/7] vfio: platform: add capability to register a reset
 function

On 10/23/2015 03:07 PM, Arnd Bergmann wrote:
> On Friday 23 October 2015 14:37:10 Eric Auger wrote:
>> +
>> +void vfio_platform_unregister_reset(const char *compat)
>> +{
>> +       struct vfio_platform_reset_node *iter, *temp;
>> +
>> +       mutex_lock(&driver_lock);
>> +       list_for_each_entry_safe(iter, temp, &reset_list, link) {
>> +               if (!strcmp(iter->compat, compat)) {
>> +                       list_del(&iter->link);
>> +                       break;
>> +               }
>> +       }
>> +
>> +       mutex_unlock(&driver_lock);
>> +}
>> +EXPORT_SYMBOL_GPL(vfio_platform_unregister_reset);
>>
> 
> This is slightly unsafe in case you ever get two drivers that register
> with the same compat string. If we care about that, we could pass
> and compare both the string and the function pointer, or the
> vfio_platform_reset_node.
OK

Thanks

Eric
> 
> 	Arnd
> 

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