public inbox for u-boot@lists.denx.de
 help / color / mirror / Atom feed
From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] mtdparts: Call nand_init() during mtdparts_init().
Date: Sat, 16 Oct 2010 00:17:01 +0200	[thread overview]
Message-ID: <20101015221701.982F61365CF@gemini.denx.de> (raw)
In-Reply-To: <20101015164801.3fd031b7@udp111988uds.am.freescale.net>

Dear Scott Wood,

In message <20101015164801.3fd031b7@udp111988uds.am.freescale.net> you wrote:
>
> > > it makes more sense to me to hide this in the header (which Scott has done)>  
> > > and let the compiler/code optimize dead crap away.
> > 
> > Why do we need an explicit call to nand_init() at all?
> > 
> > Why cannot the NAND routines check internally if they have been
> > initialized yet, and run nand_init() if and when needed?
> 
> mtdparts doesn't make any calls directly to NAND routines (other than
> this new call to nand_init).  It looks for registered MTD devices.
> 
> Until nand_init runs, you won't have any NAND mtd devices -- and no
> NAND function will be invoked where such initialization could be done.

This looks like a broken design to me.


Assume we add this call here; would it then not also be needed in the
'static' version of mtdparts_init() in "common/cmd_jffs2.c" (whatever
'static' is supposed to mean) ?


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
In the realm of scientific observation, luck is granted only to those
who are prepared.                                     - Louis Pasteur

  reply	other threads:[~2010-10-15 22:17 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-15 18:59 [U-Boot] [PATCH] mtdparts: Call nand_init() during mtdparts_init() Scott Wood
2010-10-15 19:36 ` Wolfgang Denk
2010-10-15 19:47   ` Scott Wood
2010-10-15 20:08   ` Mike Frysinger
2010-10-15 21:39     ` Wolfgang Denk
2010-10-15 21:48       ` Scott Wood
2010-10-15 22:17         ` Wolfgang Denk [this message]
2010-10-15 22:35           ` Scott Wood
2010-10-15 22:48             ` Wolfgang Denk
2010-10-15 23:05               ` Scott Wood

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=20101015221701.982F61365CF@gemini.denx.de \
    --to=wd@denx.de \
    --cc=u-boot@lists.denx.de \
    /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