linux-kernel - Re: [PATCHv2] usb: typec: tps6598x: handle block writes separately with plain-I2C adapters

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Date:   Wed, 20 Feb 2019 16:08:31 +0100 (CET)
From:   Nikolaus Voss <nv@...n.de>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guenter Roeck <linux@...ck-us.net>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2] usb: typec: tps6598x: handle block writes separately
 with plain-I2C adapters

On Wed, 20 Feb 2019, Heikki Krogerus wrote:
> On Wed, Feb 20, 2019 at 04:14:23PM +0200, Heikki Krogerus wrote:
>> On Wed, Feb 20, 2019 at 02:38:47PM +0100, Nikolaus Voss wrote:
>>> On Wed, 20 Feb 2019, Heikki Krogerus wrote:
>>>> On Wed, Feb 20, 2019 at 01:57:30PM +0100, Nikolaus Voss wrote:
>>>>> Commit 1a2f474d328f handles block _reads_ separately with plain-I2C
>>>>> adapters, but the problem described with regmap-i2c not handling
>>>>> SMBus block transfers (i.e. read and writes) correctly also exists
>>>>> with writes.
>>>>>
>>>>> As workaround, this patch adds a block write function the same way
>>>>> 1a2f474d328f adds a block read function.
>>>>>
>>>>> Fixes: 1a2f474d328f ("usb: typec: tps6598x: handle block reads separately with plain-I2C adapters")
>>>>> Fixes: 0a4c005bd171 ("usb: typec: driver for TI TPS6598x USB Power Delivery controllers")
>>>>> Signed-off-by: Nikolaus Voss <nikolaus.voss@...wensteinmedical.de>
>>>>
>>>> You are missing a "from" line with address that matches your SoB
>>>> address.
>>>
>>> That's because I currently cannot send patch mails from my company account
>>> as our MTA breaks diffs.
>>
>> I understand, but you can have a separate "From line" in your patch,
>> i.e. you send the patch using one address, and have an extra "From
>> line" (outside of the mail header) with another address.
>>
>> That other From line will be interpreted as the author address, and
>> it should match your SoB address.
>>
>>
>> Try something like this in a branch where this patch is the HEAD:
>>
>>         % export MY_COMMIT=$(git show -s --pretty=%h HEAD)
>>         % git reset HEAD^
>>         % GIT_COMMITTER_IDENT='Nikolaus Voss <nikolaus.voss@...wensteinmedical.de>' \
>>           GIT_AUTHOR_IDENT='Nikolaus Voss <nikolaus.voss@...wensteinmedical.de>' \
>>           git commit -a -C $MY_COMMIT
>
> Correction here:
>
>        % GIT_COMMITTER_IDENT='Nikolaus Voss <nikolaus.voss@...wensteinmedical.de>' \
>          GIT_AUTHOR_IDENT='Nikolaus Voss <nikolaus.voss@...wensteinmedical.de>' \
>          git commit -a -C $MY_COMMIT --reset-author
>
> That "--reset-author" was missing. Sorry for that.

Thanks, Heikki, I'll give it a try...

Nikolaus