From: Viresh Kumar <viresh.kumar@linaro.org>
To: Wolfram Sang <wsa@kernel.org>, Jie Deng <jie.deng@intel.com>,
linux-i2c@vger.kernel.org,
virtualization@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, mst@redhat.com,
jasowang@redhat.com, andriy.shevchenko@linux.intel.com,
conghui.chen@intel.com, arnd@arndb.de, kblaiech@mellanox.com,
jarkko.nikula@linux.intel.com, Sergey.Semin@baikalelectronics.ru,
rppt@kernel.org, loic.poulain@linaro.org, tali.perry1@gmail.com,
u.kleine-koenig@pengutronix.de, bjorn.andersson@linaro.org,
yu1.wang@intel.com, shuo.a.liu@intel.com, stefanha@redhat.com,
pbonzini@redhat.com
Subject: Re: [PATCH v10] i2c: virtio: add a virtio i2c frontend driver
Date: Tue, 29 Jun 2021 16:46:30 +0530 [thread overview]
Message-ID: <20210629111630.badum3mtumcujbyk@vireshk-i7> (raw)
In-Reply-To: <YNr/2E/T4FRjLOgy@ninjato>
On 29-06-21, 13:11, Wolfram Sang wrote:
>
> > The case when ``length of \field{write_buf}''=0, and at the same time,
> > ``length of \field{read_buf}''=0 is called not-a-read-write request
> > and result for such a request is I2C device specific.
>
> Obviously, I don't know much about the specs and their wording. Still I
> wonder if we can't call it a zero length transfer?
Maybe that.
> This is allowed by
> the I2C standard and SMBus has even a proper name for it (SMBUS_QUICK).
> From my point of view, I would not say it is device specific because
> devices are expected to ACK such a message.
Actually we should skip the last line from my diff, i.e. completely
drop "and result for such a request is I2C device specific".
The device (host in virtio spec terminology) still needs to return
success/failure as it does for other requests. Nothing special here.
--
viresh
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WARNING: multiple messages have this Message-ID (diff)
From: Viresh Kumar <viresh.kumar@linaro.org>
To: Wolfram Sang <wsa@kernel.org>, Jie Deng <jie.deng@intel.com>,
linux-i2c@vger.kernel.org,
virtualization@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, mst@redhat.com,
jasowang@redhat.com, andriy.shevchenko@linux.intel.com,
conghui.chen@intel.com, arnd@arndb.de, kblaiech@mellanox.com,
jarkko.nikula@linux.intel.com, Sergey.Semin@baikalelectronics.ru,
rppt@kernel.org, loic.poulain@linaro.org, tali.perry1@gmail.com,
u.kleine-koenig@pengutronix.de, bjorn.andersson@linaro.org,
yu1.wang@intel.com, shuo.a.liu@intel.com, stefanha@redhat.com,
pbonzini@redhat.com
Subject: Re: [PATCH v10] i2c: virtio: add a virtio i2c frontend driver
Date: Tue, 29 Jun 2021 16:46:30 +0530 [thread overview]
Message-ID: <20210629111630.badum3mtumcujbyk@vireshk-i7> (raw)
In-Reply-To: <YNr/2E/T4FRjLOgy@ninjato>
On 29-06-21, 13:11, Wolfram Sang wrote:
>
> > The case when ``length of \field{write_buf}''=0, and at the same time,
> > ``length of \field{read_buf}''=0 is called not-a-read-write request
> > and result for such a request is I2C device specific.
>
> Obviously, I don't know much about the specs and their wording. Still I
> wonder if we can't call it a zero length transfer?
Maybe that.
> This is allowed by
> the I2C standard and SMBus has even a proper name for it (SMBUS_QUICK).
> From my point of view, I would not say it is device specific because
> devices are expected to ACK such a message.
Actually we should skip the last line from my diff, i.e. completely
drop "and result for such a request is I2C device specific".
The device (host in virtio spec terminology) still needs to return
success/failure as it does for other requests. Nothing special here.
--
viresh
next prev parent reply other threads:[~2021-06-29 11:16 UTC|newest]
Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-23 14:19 [PATCH v10] i2c: virtio: add a virtio i2c frontend driver Jie Deng
2021-03-23 14:19 ` Jie Deng
2021-03-23 7:27 ` Viresh Kumar
2021-03-23 8:33 ` Jie Deng
2021-03-23 8:33 ` Jie Deng
2021-03-23 8:37 ` Viresh Kumar
2021-03-23 9:27 ` Arnd Bergmann
2021-03-23 9:27 ` Arnd Bergmann
2021-03-24 1:17 ` Jie Deng
2021-03-24 1:17 ` Jie Deng
2021-03-24 4:00 ` Viresh Kumar
2021-04-15 6:45 ` Viresh Kumar
2021-04-15 6:56 ` Jie Deng
2021-04-15 6:56 ` Jie Deng
2021-04-15 7:15 ` Viresh Kumar
2021-04-15 7:21 ` Wolfram Sang
2021-04-15 7:24 ` Viresh Kumar
2021-04-15 7:28 ` Wolfram Sang
2021-04-15 7:37 ` Viresh Kumar
2021-04-15 8:15 ` Jie Deng
2021-04-15 8:15 ` Jie Deng
2021-04-15 8:18 ` Wolfram Sang
2021-04-15 8:20 ` Jie Deng
2021-04-15 8:20 ` Jie Deng
2021-05-27 6:49 ` Jie Deng
2021-05-27 6:49 ` Jie Deng
2021-05-12 1:37 ` Jie Deng
2021-05-12 1:37 ` Jie Deng
2021-03-23 9:01 ` Viresh Kumar
2021-03-23 9:38 ` Viresh Kumar
2021-03-24 0:53 ` Jie Deng
2021-03-24 0:53 ` Jie Deng
2021-03-24 3:52 ` Viresh Kumar
2021-03-24 4:00 ` Jie Deng
2021-03-24 4:00 ` Jie Deng
2021-03-24 4:02 ` Viresh Kumar
2021-03-24 4:20 ` Viresh Kumar
2021-03-24 6:05 ` Jie Deng
2021-03-24 6:05 ` Jie Deng
2021-03-24 6:09 ` Viresh Kumar
2021-03-24 6:41 ` Jie Deng
2021-03-24 6:41 ` Jie Deng
2021-03-24 6:44 ` Viresh Kumar
2021-04-14 2:07 ` Jie Deng
2021-04-14 2:07 ` Jie Deng
2021-04-14 3:52 ` Viresh Kumar
2021-04-15 6:25 ` Jie Deng
2021-04-15 6:25 ` Jie Deng
2021-04-15 3:51 ` Jason Wang
2021-04-15 3:51 ` Jason Wang
2021-04-15 6:17 ` Jie Deng
2021-04-15 6:17 ` Jie Deng
2021-06-28 8:39 ` Wolfram Sang
2021-06-28 9:01 ` Arnd Bergmann
2021-06-28 9:01 ` Arnd Bergmann
2021-06-28 9:25 ` Wolfram Sang
2021-06-28 9:51 ` Arnd Bergmann
2021-06-28 9:51 ` Arnd Bergmann
2021-06-28 10:13 ` Wolfram Sang
2021-06-28 11:50 ` Arnd Bergmann
2021-06-28 11:50 ` Arnd Bergmann
2021-06-28 14:58 ` Wolfram Sang
2021-06-29 3:04 ` Jie Deng
2021-06-29 3:04 ` Jie Deng
2021-06-29 8:30 ` Wolfram Sang
2021-06-29 9:13 ` Viresh Kumar
2021-06-29 9:13 ` Viresh Kumar
2021-06-29 9:36 ` Wolfram Sang
2021-06-29 4:10 ` Viresh Kumar
2021-06-29 4:10 ` Viresh Kumar
2021-06-29 8:27 ` Wolfram Sang
2021-06-29 8:52 ` Viresh Kumar
2021-06-29 8:52 ` Viresh Kumar
2021-06-29 9:07 ` Wolfram Sang
2021-06-30 14:38 ` Wolfram Sang
2021-06-30 15:09 ` Viresh Kumar
2021-06-30 15:09 ` Viresh Kumar
2021-06-29 3:03 ` Jie Deng
2021-06-29 3:03 ` Jie Deng
2021-06-29 10:07 ` Wolfram Sang
2021-06-29 10:16 ` Viresh Kumar
2021-06-29 10:16 ` Viresh Kumar
2021-06-29 10:23 ` Wolfram Sang
2021-06-29 10:30 ` Viresh Kumar
2021-06-29 10:30 ` Viresh Kumar
2021-06-29 10:42 ` Wolfram Sang
2021-06-29 10:43 ` Wolfram Sang
2021-06-29 10:56 ` Viresh Kumar
2021-06-29 10:56 ` Viresh Kumar
2021-06-29 11:11 ` Wolfram Sang
2021-06-29 11:16 ` Viresh Kumar [this message]
2021-06-29 11:16 ` Viresh Kumar
2021-06-29 11:48 ` Wolfram Sang
2021-07-05 12:18 ` Viresh Kumar
2021-07-05 12:18 ` Viresh Kumar
2021-07-06 1:50 ` Jie Deng
2021-07-06 1:50 ` Jie Deng
2021-07-22 15:15 ` Wolfram Sang
2021-07-23 2:28 ` Viresh Kumar
2021-07-23 2:28 ` Viresh Kumar
2021-07-23 5:28 ` Viresh Kumar
2021-07-23 5:28 ` Viresh Kumar
2021-06-30 6:45 ` Jie Deng
2021-06-30 6:45 ` Jie Deng
2021-06-30 7:32 ` Wolfram Sang
2021-06-30 7:51 ` Jie Deng
2021-06-30 7:51 ` Jie Deng
2021-06-30 7:55 ` Arnd Bergmann
2021-06-30 7:55 ` Arnd Bergmann
2021-06-30 8:04 ` Wolfram Sang
2021-06-30 8:07 ` Andy Shevchenko
2021-06-30 8:07 ` Andy Shevchenko
2021-06-30 8:29 ` Arnd Bergmann
2021-06-30 8:29 ` Arnd Bergmann
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