linux-kernel - RE: [PATCH v8 2/2] efi: a misc char interface for user to update efi firmware

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Message-ID: <F54AEECA5E2B9541821D670476DAE19C4A878F01@PGSMSX102.gar.corp.intel.com>
Date:	Wed, 28 Oct 2015 09:11:57 +0000
From:	"Kweh, Hock Leong" <hock.leong.kweh@...el.com>
To:	'Matt Fleming' <matt@...sole-pimps.org>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Ong, Boon Leong" <boon.leong.ong@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Sam Protsenko <semen.protsenko@...aro.org>,
	Peter Jones <pjones@...hat.com>,
	"Andy Lutomirski" <luto@...capital.net>,
	Roy Franz <roy.franz@...aro.org>,
	"Borislav Petkov" <bp@...en8.de>,
	James Bottomley <James.Bottomley@...senpartnership.com>,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	"Fleming, Matt" <matt.fleming@...el.com>,
	"Anvin, H Peter" <h.peter.anvin@...el.com>
Subject: RE: [PATCH v8 2/2] efi: a misc char interface for user to update
 efi firmware

> -----Original Message-----
> From: Matt Fleming [mailto:matt@...sole-pimps.org]
> Sent: Monday, October 12, 2015 8:11 PM
> 
> > +};
> > +
> > +static DEFINE_MUTEX(capsule_loader_lock);
> 
> What does this lock protect?

This lock is to protect when one of the instance calling efi_capsule_update()
API and the other instance calling efi_capsule_supported() API.

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