From: afzal.mohd.ma@gmail.com (afzal mohammed)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: nommu: access ID_PFR1 only if CPUID scheme
Date: Thu, 23 Mar 2017 16:13:10 +0530 [thread overview]
Message-ID: <20170323104310.GA6941@afzalpc> (raw)
In-Reply-To: <20170317164034.4036-1-afzal.mohd.ma@gmail.com>
Hi,
On Fri, Mar 17, 2017 at 10:10:34PM +0530, afzal mohammed wrote:
> Greg upon trying to boot no-MMU Kernel on ARM926EJ reported boot
> failure. He root caused it to ID_PFR1 access introduced by the
> commit mentioned in the fixes tag below.
>
> All CP15 processors need not have processor feature registers, only
> for architectures defined by CPUID scheme would have it. Hence check
> for it before accessing processor feature register, ID_PFR1.
>
> Fixes: f8300a0b5de0 ("ARM: 8647/2: nommu: dynamic exception base address setting")
> Reported-by: Greg Ungerer <gerg@uclinux.org>
> Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com>
Greg, can i add your Tested-by ?
Regards
afzal
> ---
>
> Hi Russell,
>
> It would be good to have the fix go in during -rc, as,
>
> 1. Culprit commit went in during the last merge window
> 2. Though nothing supported in mainline is known to be broken, the
> original change needs to be modified to be reliable
next prev parent reply other threads:[~2017-03-23 10:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-17 16:40 [PATCH] ARM: nommu: access ID_PFR1 only if CPUID scheme afzal mohammed
2017-03-23 10:43 ` afzal mohammed [this message]
2017-03-23 11:37 ` Greg Ungerer
2017-03-23 12:57 ` afzal mohammed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170323104310.GA6941@afzalpc \
--to=afzal.mohd.ma@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).