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From: Wang YanQing <udknight-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Matt Fleming
	<matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>,
	Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
	"H . Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
	Ard Biesheuvel
	<ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	David Herrmann
	<dh.herrmann-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Peter Jones <pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Subject: Re: [PATCH 2/3] x86/sysfb_efi: Fix valid BAR address range check
Date: Wed, 4 May 2016 23:43:47 +0800	[thread overview]
Message-ID: <20160504154344.GA3146@udknight> (raw)
In-Reply-To: <20160504063524.GB12846-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

On Wed, May 04, 2016 at 08:35:24AM +0200, Ingo Molnar wrote:
> 
> * Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org> wrote:
> 
> > From: Wang YanQing <udknight-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > 
> > We can't just break out when meet start is equal to zero,
> 
> Hm, wot?
> 
> Thanks,
> 
> 	Ingo

Sorry for my poor English ,and poor commit message, this bring
trouble for more than one maintainer, I guess.

The old code use below comparion as condition to terminate valid 
range check without care whether there are more ranges in later
BARs:
"
        if (start == 0)
            break;
"

I guess original author think (or make a mistake) when we meet a 
address range begin from zero means it is a invalid address range, 
and no valid address ranges in remain BARs.

So I said:
We can't break the loop when meet range whose start address is zero,
without check it and remaining BARs' range.

Thanks.

  parent reply	other threads:[~2016-05-04 15:43 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-03 19:29 [GIT PULL 0/3] EFI urgent fixes Matt Fleming
     [not found] ` <1462303781-8686-1-git-send-email-matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-05-03 19:29   ` [PATCH 1/3] MAINTAINERS: Remove asterisk from EFI directory names Matt Fleming
2016-05-03 19:29 ` [PATCH 2/3] x86/sysfb_efi: Fix valid BAR address range check Matt Fleming
2016-05-04  6:35   ` Ingo Molnar
2016-05-04  9:25     ` Matt Fleming
2016-05-04 10:23       ` Ingo Molnar
     [not found]         ` <20160504102340.GA4470-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-05-04 10:29           ` Matt Fleming
     [not found]     ` <20160504063524.GB12846-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-05-04 15:43       ` Wang YanQing [this message]
2016-05-03 19:29 ` [PATCH 3/3] x86/efi-bgrt: Switch all pr_err() to pr_notice() for invalid BGRT Matt Fleming

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