linux-kernel - Re: [PATCH v4 2/2] efi: an sysfs interface for user to update efi firmware

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Date:	Wed, 29 Apr 2015 14:37:56 -0700
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	"Kweh, Hock Leong" <hock.leong.kweh@...el.com>,
	Peter Jones <pjones@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Ming Lei <ming.lei@...onical.com>,
	"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>,
	Roy Franz <roy.franz@...aro.org>,
	Borislav Petkov <bp@...en8.de>,
	Al Viro <viro@...iv.linux.org.uk>,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH v4 2/2] efi: an sysfs interface for user to update efi
 firmware

On Wed, 2015-04-29 at 11:40 -0700, Andy Lutomirski wrote:
> If it works (and cat really does fail reliably), then it seems okay to me.
> 
> However, since I like pulling increasing numbers of my hats, someone
> should verify that the common embedded cat implementations are also
> okay with this.  For example, I haven't yet found any code in
> busybox's cat implementation that closes stdout.
> 
> Given that the main targets of this (for now, at least) are embedded,
> this might be a problem.

I think that rabbit is a bit mixie: we already demonstrated we *can*
collect the error in close.  It's up to the fw vendors who want to use
this method to make sure they have proper tools (and if busybox cat
needs fixing, to fix it before they ship).

James


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