From: "Emilio G. Cota" <cota@braap.org>
To: Martyn Welch <martyn.welch@ge.com>
Cc: Greg KH <greg@kroah.com>, LKML <linux-kernel@vger.kernel.org>,
devel@driverdev.osuosl.org,
Juan David Gonzalez Cobas <david.cobas@gmail.com>,
Bill Pemberton <wfp5p@virginia.edu>
Subject: Re: [PATCH 04/30] staging/vme: allow non-dynamic allocation of bus numbers
Date: Wed, 3 Nov 2010 23:40:56 -0400 [thread overview]
Message-ID: <20101104034056.GC9037@flamenco.cs.columbia.edu> (raw)
In-Reply-To: <20101027151327.GR10869@flamenco.cs.columbia.edu>
On Wed, Oct 27, 2010 at 11:13:27 -0400, Emilio G. Cota wrote:
> On Wed, Oct 27, 2010 at 10:41:18 +0100, Martyn Welch wrote:
> > On 26/10/10 02:10, Emilio G. Cota wrote:
> > > From: Emilio G. Cota <cota@braap.org>
> > >
> > > In a configuration with several bridges, each bridge is
> > > assigned a certain bus number depending on the order in which
> > > vme_register_bridge is called. This can complicate multi-bridge
> > > installations because the eventual bus numbers will depend
> > > on the order the bridges were loaded.
> > >
> > > The appended allows bridges to register with a bus number of
> > > their choice, while keeping the previous 'first come, first
> > > served' behaviour as the default.
> > >
> >
> > I can't see where this is being used.
>
> Each driver's .probe is fed with bus_number and slot_number.
> Normally the driver will check that pair against what it received
> through modparams and act accordingly.
>
> For this to be reliable bus numbering should be consistent on
> a given system, i.e. it should be possible to always allocate
> the same bus number to a given bus. Otherwise, depending on
> which bridge is installed first, we'd get different bus numbers
> assigned.
>
> Does that make it clearer now?
>
> > I assume this is a part of future changes you wish to make?
>
> AFAICT it affects the current model.
Martyn,
Have you had time to re-check this one?
Thanks
Emilio
next prev parent reply other threads:[~2010-11-04 3:41 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-26 1:10 [re-send][-next] staging/vme: various fixes + new driver model for VME Emilio G. Cota
2010-10-26 1:10 ` [PATCH 01/30] staging/vme: style: convert '&(foo)' to '&foo' Emilio G. Cota
2010-10-27 9:17 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 02/30] staging/vme_user: return the appropriate error code when module_init fails Emilio G. Cota
2010-10-27 9:25 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 03/30] staging/vme_user: remove unreachable line Emilio G. Cota
2010-10-27 9:39 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 04/30] staging/vme: allow non-dynamic allocation of bus numbers Emilio G. Cota
2010-10-27 9:41 ` Martyn Welch
2010-10-27 15:13 ` Emilio G. Cota
2010-11-04 3:40 ` Emilio G. Cota [this message]
2010-11-05 16:29 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 05/30] staging/vme: fix bogus clearing of the bus number in vme_free_bus_num Emilio G. Cota
2010-10-27 9:49 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 06/30] staging/vme/tsi148: use list_for_each_safe when deleting resources in .remove Emilio G. Cota
2010-10-27 9:51 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 07/30] staging/vme/tsi148: remove double freeing of the IRQ " Emilio G. Cota
2010-10-27 10:01 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 08/30] staging/vme/tsi148: fix warning in free_irq Emilio G. Cota
2010-10-27 10:23 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 09/30] staging/vme: fill in struct device's .release, even if it's a NOOP Emilio G. Cota
2010-10-27 10:54 ` Martyn Welch
2010-10-27 14:46 ` Emilio G. Cota
2010-10-27 15:03 ` Martyn Welch
2010-10-27 15:15 ` Emilio G. Cota
2010-10-28 1:17 ` Greg KH
2010-10-28 6:07 ` Emilio G. Cota
2010-10-28 17:56 ` Greg KH
2010-11-12 11:13 ` [PATCH 00/17] Series short description Martyn Welch
2010-11-12 11:14 ` [PATCH 01/17] staging/vme: style: convert '&(foo)' to '&foo' Martyn Welch
2010-11-12 11:14 ` [PATCH 02/17] staging/vme_user: return the appropriate error code when module_init fails Martyn Welch
2010-11-12 11:14 ` [PATCH 03/17] staging/vme_user: remove unreachable line Martyn Welch
2010-11-12 11:14 ` [PATCH 04/17] staging/vme: fix bogus clearing of the bus number in vme_free_bus_num Martyn Welch
2010-11-12 11:14 ` [PATCH 05/17] staging/vme/tsi148: use list_for_each_safe when deleting resources in .remove Martyn Welch
2010-11-12 11:14 ` [PATCH 06/17] staging/vme/tsi148: remove double freeing of the IRQ " Martyn Welch
2010-11-12 11:14 ` [PATCH 07/17] staging/vme/tsi148: fix warning in free_irq Martyn Welch
2010-11-12 11:14 ` [PATCH 08/17] staging/vme/tsi148: remove unreachable line Martyn Welch
2010-11-12 11:15 ` [PATCH 09/17] staging/vme/tsi148: declare static functions as such Martyn Welch
2010-11-12 11:15 ` [PATCH 10/17] staging/vme/ca91cx42: " Martyn Welch
2010-11-12 11:15 ` [PATCH 11/17] staging/vme_user: declare private variables as static Martyn Welch
2010-11-12 11:15 ` [PATCH 12/17] staging/vme_user: use an unsigned int for counting the number of kparams Martyn Welch
2010-11-12 11:15 ` [PATCH 13/17] staging/vme_user: remove __iomem marking from kern_buf and derivates Martyn Welch
2010-11-12 11:15 ` [PATCH 14/17] staging/vme_user: mark user-space buffers with __user Martyn Welch
2010-11-12 11:15 ` [PATCH 15/17] staging/vme: mark struct vme_master_resource's base address pointer as __iomem Martyn Welch
2010-11-12 11:15 ` [PATCH 16/17] staging/vme/tsi148: mark the registers' " Martyn Welch
2010-11-12 11:15 ` [PATCH 17/17] staging/vme/ca91cx42: " Martyn Welch
2010-11-12 11:23 ` [PATCH 00/17] Series short description Martyn Welch
2010-11-12 15:11 ` Emilio G. Cota
2010-11-12 15:52 ` Martyn Welch
2010-11-16 19:40 ` Greg KH
2010-10-26 1:10 ` [PATCH 10/30] staging/vme/tsi148: remove unreachable line Emilio G. Cota
2010-10-27 11:06 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 11/30] staging/vme/tsi148: declare static functions as such Emilio G. Cota
2010-10-27 11:23 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 12/30] staging/vme/ca91cx42: " Emilio G. Cota
2010-10-27 11:24 ` Martyn Welch
2010-10-26 1:10 ` [PATCH 13/30] staging/vme_user: declare private variables as static Emilio G. Cota
2010-10-27 11:29 ` Martyn Welch
2010-10-26 1:11 ` [PATCH 14/30] staging/vme_user: use an unsigned int for counting the number of kparams Emilio G. Cota
2010-10-27 11:29 ` Martyn Welch
2010-10-26 1:11 ` [PATCH 15/30] staging/vme_user: remove __iomem marking from kern_buf and derivates Emilio G. Cota
2010-10-27 12:20 ` Martyn Welch
2010-10-26 1:11 ` [PATCH 16/30] staging/vme_user: mark user-space buffers with __user Emilio G. Cota
2010-10-27 12:20 ` Martyn Welch
2010-10-26 1:11 ` [PATCH 17/30] staging/vme: mark struct vme_master_resource's base address pointer as __iomem Emilio G. Cota
2010-10-27 12:20 ` Martyn Welch
2010-10-26 1:11 ` [PATCH 18/30] staging/vme/tsi148: mark the registers' " Emilio G. Cota
2010-10-27 12:20 ` Martyn Welch
2010-10-26 1:11 ` [PATCH 19/30] staging/vme/ca91cx42: " Emilio G. Cota
2010-10-27 12:20 ` Martyn Welch
2010-10-26 1:11 ` [PATCH 20/30] staging/vme: trivial: rename vme_bus_num_mtx to vme_buses_lock Emilio G. Cota
2010-10-26 1:11 ` [PATCH 21/30] staging/vme: keep a list of registered buses (bridges) Emilio G. Cota
2010-10-26 1:11 ` [PATCH 22/30] staging/vme/vme_user: use __dev{init,exit} for .probe and .remove Emilio G. Cota
2010-12-03 13:44 ` [PATCH] staging/vme/vme_user: use __dev{init, exit} " Martyn Welch
2010-10-26 1:11 ` [PATCH 23/30] staging/vme_user: fix usage of the slave resources after they've been freed Emilio G. Cota
2010-12-03 9:05 ` [PATCH] " Martyn Welch
2010-10-26 1:11 ` [PATCH 24/30] staging/vme_user: remove unnecessary call to vme_slave_set Emilio G. Cota
2010-10-27 12:24 ` Martyn Welch
2010-10-27 14:59 ` Emilio G. Cota
2010-10-26 1:11 ` [PATCH 25/30] staging/vme_user: add missing calls to vme_master_free calls in .remove Emilio G. Cota
2010-12-03 14:20 ` [PATCH] " Martyn Welch
2010-12-03 14:44 ` Greg KH
2010-12-03 15:29 ` Martyn Welch
2010-10-26 1:11 ` [PATCH 26/30] staging/vme: move all contents of vme_bridge.h to vme.h Emilio G. Cota
2010-10-26 1:11 ` [PATCH 27/30] staging/vme: rework the bus model Emilio G. Cota
2010-11-04 4:16 ` Emilio G. Cota
2010-10-26 1:11 ` [PATCH 28/30] staging/vme: convert vme_* users to vme_*_ng Emilio G. Cota
2010-10-26 1:11 ` [PATCH 29/30] staging/vme: remove unused vme_* functions and related code Emilio G. Cota
2010-10-26 1:11 ` [PATCH 30/30] staging/vme: remove _ng suffixes Emilio G. Cota
2010-11-09 23:12 ` [re-send][-next] staging/vme: various fixes + new driver model for VME Greg KH
-- strict thread matches above, loose matches on Subject: below --
2010-10-22 6:36 [-next] " Emilio G. Cota
2010-10-22 6:36 ` [PATCH 04/30] staging/vme: allow non-dynamic allocation of bus numbers Emilio G. Cota
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=20101104034056.GC9037@flamenco.cs.columbia.edu \
--to=cota@braap.org \
--cc=david.cobas@gmail.com \
--cc=devel@driverdev.osuosl.org \
--cc=greg@kroah.com \
--cc=linux-kernel@vger.kernel.org \
--cc=martyn.welch@ge.com \
--cc=wfp5p@virginia.edu \
/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).