Re: [Xen-devel] [PATCH for-4.5] call xc_domain_irq_permission before xc_domain_irq_permission

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 23.01.15 at 13:59, <linux@xxxxxxxxxxxxxx> wrote:

> Friday, January 23, 2015, 1:42:04 PM, you wrote:
> 
>> On Mon, 1 Dec 2014, Stefano Stabellini wrote:
>>> xc_physdev_unmap_pirq might revoke the permission to map the irq from
>>> the domain causing the following xc_domain_irq_permission call to fail
>>> and return error (domain_pirq_to_irq returns 0).
>>> 
>>> Call xc_domain_irq_permission first to prevent this from happening
>>> (xc_physdev_unmap_pirq calls irq_deny_access, that doesn't fail if the
>>> permission is already removed).
>>> 
>>> This is a simple bug fix and I think should go in 4.5.
>>> 
>>> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> 
>> This patch didn't actually make it into 4.5, but I think it should have.
>> We could at least apply to master now.
> 
> Didn't Jan issue a patch for that in:
> http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=6fb3a07bc0ad656b5f76eb9f 
> c961bcd1d3cace58

Indeed, that one was meant to make this one unnecessary.

Jan


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