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Message-ID: <f8ce2911-e6f2-4423-9ace-262432ec19ad@leemhuis.info>
Date:   Wed, 4 Oct 2023 07:07:38 +0200
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Subject: Re: [PATCH] Input: elantech - fix fast_reconnect callback in ps2 mode
To:     Jeffery Miller <jefferymiller@google.com>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc:     regressions@lists.linux.dev, benjamin.tissoires@redhat.com,
        Andrew Duggan <aduggan@synaptics.com>,
        Andrew Duggan <andrew@duggan.us>, loic.poulain@linaro.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20231004005729.3943515-1-jefferymiller@google.com>
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From:   Thorsten Leemhuis <linux@leemhuis.info>
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In-Reply-To: <20231004005729.3943515-1-jefferymiller@google.com>
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Precedence: bulk

On 04.10.23 02:57, Jeffery Miller wrote:
> Make `elantech_setup_ps2` set a compatible fast_reconnect pointer
> when its ps2 mode is used.
> 
> When an SMBus connection is attempted and fails `psmouse_smbus_init`
> sets fast_reconnect to `psmouse_smbus_reconnect`.
> `psmouse_smbus_reconnect` expects `psmouse->private` to be
> `struct psmouse_smbus_dev` but `elantech_setup_ps2` replaces
> it with its private data. This was causing an issue on resume
> since psmouse_smbus_reconnect was being called while in ps2, not SMBus
> mode.
> 
> This was uncovered by commit 92e24e0e57f7 ("Input: psmouse - add delay when
> deactivating for SMBus mode")

Ahh, thx for investigating. This fixes things for me. Feel free to add:

Tested-by: Thorsten Leemhuis <linux@leemhuis.info>

> Closes:
> Link:https://lore.kernel.org/all/ca0109fa-c64b-43c1-a651-75b294d750a1@leemhuis.info/
> Reported-by: Thorsten Leemhuis <linux@leemhuis.info>

Side note: something went sideways here, it afaics should look something
like this:

"""
> Reported-by: Thorsten Leemhuis <linux@leemhuis.info>
> Closes:
https://lore.kernel.org/all/ca0109fa-c64b-43c1-a651-75b294d750a1@leemhuis.info/
"""

Thx again. Ciao, Thorsten