From: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
To: Guenter Roeck <groeck-3r7Miqu9kMnR7s880joybQ@public.gmane.org>
Cc: Danielle Costantino
<danielle.costantino-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-i2c <linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Bjorn Helgaas <bhelgaas-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Jiri Kosina <jkosina-AlSwsSmVLrQ@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
"David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
"linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Rajat Jain <rajatjain-3r7Miqu9kMnR7s880joybQ@public.gmane.org>
Subject: Re: Fwd: [Proposal] PM sleep children of inactive I2C bus segments off Masters in multi-master systems
Date: Wed, 1 Oct 2014 23:10:47 +0200 [thread overview]
Message-ID: <20141001211046.GA2368@katana> (raw)
In-Reply-To: <20141001204302.GA7744-VN48AwQc75yrkUfnaQMJWRyWsx42SBjsMbKr+jor3Jc@public.gmane.org>
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> Maybe you can find an error code which with some level of confidence
> reflects "lost mastership". Then you can implement whatever makes sense
> for your use case in your user space application(s).
We have a documented fault code for ArbitrationLost and that is -EAGAIN
(see Documentation/i2c/fault-codes). If a driver does use something
else, patches are very welcome.
Other than that, I find this thread very confusing. Of course can
another master modify the clients, this is what multi-master is all
about, no?
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WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa@the-dreams.de>
To: Guenter Roeck <groeck@juniper.net>
Cc: Danielle Costantino <danielle.costantino@gmail.com>,
linux-i2c <linux-i2c@vger.kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Jiri Kosina <jkosina@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
"David S. Miller" <davem@davemloft.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
Rajat Jain <rajatjain@juniper.net>
Subject: Re: Fwd: [Proposal] PM sleep children of inactive I2C bus segments off Masters in multi-master systems
Date: Wed, 1 Oct 2014 23:10:47 +0200 [thread overview]
Message-ID: <20141001211046.GA2368@katana> (raw)
In-Reply-To: <20141001204302.GA7744@svl-evodev-groeck.juniper.net>
[-- Attachment #1: Type: text/plain, Size: 521 bytes --]
> Maybe you can find an error code which with some level of confidence
> reflects "lost mastership". Then you can implement whatever makes sense
> for your use case in your user space application(s).
We have a documented fault code for ArbitrationLost and that is -EAGAIN
(see Documentation/i2c/fault-codes). If a driver does use something
else, patches are very welcome.
Other than that, I find this thread very confusing. Of course can
another master modify the clients, this is what multi-master is all
about, no?
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
next prev parent reply other threads:[~2014-10-01 21:10 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-01 18:34 [Proposal] PM sleep children of inactive I2C bus segments off Masters in multi-master systems Danielle Costantino
[not found] ` <CAAVjN7dwS62EKMnuZc_P1UjkbRVk6RXqJ91GwWZ96bbY5Ct-rg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-01 18:39 ` Fwd: " Danielle Costantino
2014-10-01 18:39 ` Danielle Costantino
2014-10-01 18:43 ` Guenter Roeck
2014-10-01 18:44 ` Danielle Costantino
2014-10-01 19:41 ` Guenter Roeck
2014-10-01 20:03 ` Danielle Costantino
2014-10-01 20:20 ` Guenter Roeck
2014-10-01 20:32 ` Danielle Costantino
2014-10-01 20:43 ` Guenter Roeck
2014-10-01 20:49 ` Danielle Costantino
[not found] ` <20141001204302.GA7744-VN48AwQc75yrkUfnaQMJWRyWsx42SBjsMbKr+jor3Jc@public.gmane.org>
2014-10-01 21:10 ` Wolfram Sang [this message]
2014-10-01 21:10 ` Wolfram Sang
2014-10-01 21:16 ` Guenter Roeck
2014-10-01 21:16 ` Guenter Roeck
2014-10-01 21:21 ` Wolfram Sang
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