From: Cornelia Huck <cohuck@redhat.com>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
"Jie Deng" <jie.deng@intel.com>, "Wolfram Sang" <wsa@kernel.org>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Vincent Guittot" <vincent.guittot@linaro.org>,
"Jason Wang" <jasowang@redhat.com>,
"Bill Mills" <bill.mills@linaro.org>,
"Alex Bennée" <alex.bennee@linaro.org>,
virtio-dev@lists.oasis-open.org, stratos-dev@op-lists.linaro.org,
"Gerd Hoffmann" <kraxel@redhat.com>,
"Arnd Bergmann" <arnd@kernel.org>
Subject: [virtio-dev] Re: [PATCH V5 2/2] virtio: i2c: Allow zero-length transactions
Date: Wed, 13 Oct 2021 11:44:03 +0200 [thread overview]
Message-ID: <878ryxw97g.fsf@redhat.com> (raw)
In-Reply-To: <20211013093316.ehxp5xizo5sy52ct@vireshk-i7>
On Wed, Oct 13 2021, Viresh Kumar <viresh.kumar@linaro.org> wrote:
> On 13-10-21, 11:26, Cornelia Huck wrote:
>> On Tue, Oct 12 2021, Viresh Kumar <viresh.kumar@linaro.org> wrote:
>> > @@ -124,13 +140,23 @@ \subsubsection{Device Operation: Operation Status}\label{sec:Device Types / I2C
>> >
>> > \drivernormative{\subsubsection}{Device Operation}{Device Types / I2C Adapter Device / Device Operation}
>> >
>> > +A driver SHOULD implement the VIRTIO_I2C_F_ZERO_LENGTH_REQUEST feature.
>>
>> Make this MUST, or maybe "MUST accept"? The central point of the feature
>> flag (at least for me) was to be able to change the semantics and format
>> without things breaking silently.
>
> Right.
>
>> I don't think we need to keep old
>> driver revisions compliant?
>
> No, we don't.
Thinking some more, we'll also probably want the driver to reject any
device that does not offer the feature. Just keep those old device/driver
revisions to themselves :)
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next prev parent reply other threads:[~2021-10-13 9:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-12 11:23 [PATCH V5 0/2] virtio: i2c: Allow zero-length transactions Viresh Kumar
2021-10-12 11:23 ` [PATCH V5 1/2] virtio: i2c: No need to have separate read-write buffers Viresh Kumar
2021-10-12 13:58 ` Arnd Bergmann
2021-10-12 11:23 ` [PATCH V5 2/2] virtio: i2c: Allow zero-length transactions Viresh Kumar
2021-10-12 14:09 ` Arnd Bergmann
2021-10-13 2:32 ` [virtio-dev] " Jie Deng
2021-10-13 3:39 ` Viresh Kumar
2021-10-13 4:07 ` [virtio-dev] " Jie Deng
2021-10-13 4:12 ` Viresh Kumar
2021-10-13 9:26 ` [virtio-dev] " Cornelia Huck
2021-10-13 9:33 ` Viresh Kumar
2021-10-13 9:44 ` Cornelia Huck [this message]
2021-10-13 10:43 ` Viresh Kumar
2021-10-13 11:10 ` [virtio-dev] " Cornelia Huck
2021-10-13 2:25 ` [PATCH V5 0/2] " Jie Deng
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